While engine is running/idling, pull each spark plug wire off existing spark plug, one at a time. Soon as you notice no differential within engine idle, and-or engine running in general smoothly. You just located correct cylinder that's creating mis-fire. If you pull a spark plug wire off the spark plug, you notice the engine stumble, run rough, that designated/particular cylinder is functioning correctly for most part. Also if you touch your spark plug wires when engine is running, feel a shock, the wires are definitely in need replacement. Very highly probable, one or more spark plug wires are arching between each other, cylinder or cylinders not receiving full spark capability. Sometimes can see this arching, if it's dark enough within engine compartment. Spark plug gaping is also very important, spark jumping around the electrode within the spark plug itself, weak spark when piston reached tdc/top dead center. Piston reaching top within cylinder, spark timed to ignite fuel at this point.
This actually helped me figure out it was the coil pack I could unplug that one and nothing would happen the rest when I unplugged or disconnected a little bit the car would try to turn off
My car is showing P0304 and has a rough idle just like in this video but when driving has no issues (maybe some power loss, haven't pushed it) and I've never had a check engine light pop up. So far i've changed the coil packs, spark plugs, injectors, valve seals and nothing has worked. My next step is to check the compression once I get a tester. Any idea what the problem might be? And if the compression is low in cylinder 4 what exactly could be the issue/fix?
I just started having this problem I drove the car home perfectly fine but when I went to move it the check engine light came on now I have codes P0303,p0301,p0303 an p0300 I changed all the spark plugs but now I’m starting to think it’s my coils an valve gasket any idea what it can be before I got out an buy all these new parts one of the coils had a lil drop of oil on it but the rest seemed to be fine it’s a 2010 civic 1.8l
When I try to replace the spark plug on my civic 2009 P0302, I found oil all over the engine and the coil pack. I knew that I needed a new gasket cover but didn’t do it on time…now how can I temporarily clean the oil?
Use socket keep sticking in out clean socket over and over till u get as much as it can be possable then use tissue stick it down last of all remove the plug clean it out well
Had the engine light come on, cheap code reader gave it as cylinder 4 misfire, P0304. Swapped plugs and coil around with that cylinder with number two, still getting P0304. So obviously its not down to coil and plug. Its very intermittent, you dont notice the misfire, its certainly not down a cylinder. I can wipe the code and it will be ok for a couple of weeks, then the light comes back on, wipe it, and so on.
Would this process also work for a 2007 Hybrid Civic? Having flashing check engine light and some vibrations/stalling issues. Did have some of the coils/plugs changed by a mechanic a few months ago. If process is the same figured I’d take by auto parts store to get a code read on it.
I have a 2006 civic, it’s saying cylinder 2 misfire, we replace the coil, still having problems. We’re gonna do plugs next, but when I get to like 60mph and then have to slow down and then give it gas again it starts jerking a little, and then on any sort of hill, big or small sometimes it will lose power and check engine light starts flashing, but I can pull over turn the car off and back on CEL will go off and it does fine for a few miles… I’m so confused on what it could be!
I put brand new coil packs and sparks plugs in my 09 civic about two months ago and two days ago the check engine light came on..the sparks plugs are not gapped though I don’t know if that matters..and my cold air intake is dirty beyond belief
I got a 02' Civic LX (non-vtec) Recently got the Head Gasket replace and the Head Resurfaced. Mechanic claimed he changed the spark plugs also. Then after that i had a misfire in cyl 4. (P0304), Took it to my mechanic again and he replaced the coil, but he didnt replace the other 3. (Have no ideas why he did that) 2 weeks later i got the same p0304 misfire code. Should i have the fuel injectors checked this time? The car is at 196k miles.
Hey so I recently had my evap canister replaced and a week later I’m having cylinder 3 misfire issues. I changed my spark plugs, coils, did a check on the relays and they’re all making power. It’s a 2016 Honda civic, is this something you’ve ever encountered?
My 2009 honda civic has P0300,P0301,P0302,P0303,P0304 code. I have taken this car to every mecanic in my area and no one has found the problem they dont know what it has, the car runs smooth but in a certain time the check engine light starts to flashing and when starts flashing the car losses power and when i turn it off it right away it goes back to normal but in a couple minutes it starts to do the same thing. I changed the sparkplugs and coils and nothing. Have you deal with this problem before? Can you tell me what can i do. Thank you so much for your time
Radon misfire and all cylinders misfire can be cause by vaccum leak or oxygen sensor can cause this I would try cleaning on upstream sensor also. EGR valve if it got one. And I’d ur oil grade and oil clean?
Idk if you still respond to these but I’m having the issue where my 2001 civic ex will start good then as I drive it, it starts getting tougher and rougher till it eventually sputters out. I have codes: P0336 P1362 P0301 P0302 P0303 and P0300 any advice?
@@RBTheMechanicso I haven’t changed the sensor but I unplugged it and took it for a test drive since I heard it’s sort of the same thing and nothing changed in fact it ran rougher. Should I still change it? On a side note I don’t know if this adds to it but it smells like something is burning but I’m no professional so I couldn’t tell you what but it smells bad
I have a 2010 honda accord 3.5 liter the scan said missing on all cylinders and vsa light keeps popping on and off what's your thoughts on my situation
One of mechanic did the spark plug swap and found the code still on. Then he told it might be the valve and he wanted to adjust the valves. But then I showed to another mechanic and he observes that my gasket is loose and there is oil leak also he said oil leak is causing that. Now I am confused whom to believe. What do you think. Thank you
My engine light keeps blinking and i put a scanner and got the code p0301 it says DTC severity 2 of 3 repair immediately if drivability issues are present
@@franciscomexico7131You are lucky. I have same check-light flashing issue. I have changed plugs but yet to change coils. Still flashing so I want to go back and change possibly all coils.
My Honda Civic 2016 has code p0303 while driving all dashboard lights went on, changed the sparkplugs & coils and was good for some days then it happened again, any guess? Thanks in advanced 🙏🏻
It'll have P0300 Random multiple misfires...Usually needs plugs and or the piston rings are worn letting oil past the them to foul the plugs..Crank shaft or camshaft sensor..Distributor,coil or related parts if not coil on plug like newer engines..Water running down in where coils are from bad weatherstripping along the cowl or rear of hood...Usually a certain car will have a certain problem when the P0300
So I have code P0301 2008 SI I did the coil test so my bad one , cylinder 1. I swapped it with cylinder 3. It still reads that cylinder 1 is misfiring even though I swapped it so it can’t be coils. I put brand new spark plugs I don’t think that is it either. Could it by my fuel injector? When I remove the coil from cylinder 1 it makes no difference. No matter which coil. Same thing with injectors. ANY idea?
That’s misfire do tune up swap the coil from cylinder 3 to another cylinder see if the misfire changes to diffrent cylinder. These cars are known from ba do hector and seals causing misfire
@@RBTheMechanic I have same issue code ps301 Cylinder 1 misfire. Swapped coil from cylinder 2 to cylinder 1 and the same code po301 remains. Do I need to change spark plugs?
Hey, bozz, I changed my maf sensor my coils, my spark plugs my fuel injectors. Now I'm getting a misfire in cylinder one and also throwing a code. U0401 - 68. I move the spark plugs around. I move the coils around still cylinder. One misfire with the code U. A 401 -, 68, can you please help? Thank you very much
The issue before it was shaking rough idoland it just was like losing power. So, then I did a lot of research here and there and I changed like I said all the stuff I changed, so I got to the injectors and I thought that's the last thing I probably gotta do and yes, when I took him out they were really corroded and so and that's all. I did. I took out the injectors, put them back the way they said didn't touch this or that and? Pretty much that was it.I just can't figure it out
Well the stall need to be figured out anyways when dose it stall when u come to red light or stop sign? What is ur idle rpm once the car is cold. I would do throttle cleaning service to get this repair started
I have the same code on my 2017 Hyundai accent I changed all four spark plugs and all four ignition coils still having the same problem. What could be the issue now?
@@RBTheMechanic Amsoil full synthetic every 5000 miles. I was thinking probably fuel injector, but I am averaging 41.2 miles per gallon highway at 80 mph in Utah. What else do you think it could be?
5:37 HELP!! Code- P0302-11 So far: Engine coil replaced- tried changing them between each other- same code- tried swapping the spark plugs, engine 2 again Ordered replacement plugs, jic, but I’m worried b/c I already checked by swapping. Any suggestions?
I started with a misfire on 2 and 3 and I changed the cylinders and a few days later i had a misfire on 3 and changed that one out and for a few weeks I had no issues but today the issue came back in 1.2. and 3. What do I do now??
Start with doing basics change out plugs and coil and reset the light also do oil change use good oil the vtec works off oil dirty old and low oil can cause this type of issue
Is it odd that the issue starts with misfire in P0302 and P0303 and I fix that issue and it comes back at P0303 and I address that issue and a few weeks later it now comes back in P0301,P0302, P0303...Oil was changed in May of this year and the coil packs were replaced earlier this year and not because I had issues at that time, I just thought it be good to change them when I was doing a tune up this past spring... I noticed this latest issue last night when I started the car up I seen the engine light flash a few times with a low vibration, and it stopped and the engine smoothed out when I drove off to head home. It only acts like that at start up..
Brother I'm having a awful time trying to figure this out. I hooked up a obd2 reader because our truck "only vehicle" isn't running very well. I received codes po300 all the way thru po306 "all cylinders" misfire. Last month i replaced all six plugs and all six ignition coils. I also codes po404 po420 and po430 Some codes was on there twice even. The truck ran great before and now it'll run but we are afraid to drive it. My father inlaw thinks it's a clogged catalytic converter. The truck is a 2008 Honda Ridgeline What do you think? Amy help is greatly appreciated, God bless... Me, I'm not a mechanic i just figure out what's wrong then i fix it. I'm lost on this...
Neither i bought a new egr and put it on. Yesterday the obd reader gave me 14 codes. Today it gave me 4 codes of po300, po301, Po302 and po306. That's a huge difference. I'm wondering now if I should change the idle air control. What do you think? Again thank you my friend, God bless...
I found out has a idle speed control that I cannot clean but I can replace. Today I put on the egr and took off the throttle body and cleaned it. It got up to 6 or 700 rpm where it was on like 4 or 500 so that's a small improvement on that. I'm thinking I might ruin some sea foam through the throttle body and see what hairball at this point. I'm also thinking I might have gotten some bad plugs or or coils from the auto parts but not sure. I'm also gonna see if I can clean the catalytic converter. I'm thinking it might be clogged enough from all the carbon because i did get quite a bit of soot from the tailpipe. What do you think? I thank you much for taking time to reply brother, God bless...
Mine turns on idles roughly, then when I go into drive it turns off completely already changed the bad spark plug and coil which were the only ones failing now I have p0300-p0304
It happened to me for the first time today, my battery used to die on honda civic 2007 cus there was some short circuit which drained battery so got it fixed from the mechanic, on my way back I noticed the check engine light flashing (i always had check engine light on for like 5 months but its always still so i ignored it, today on my way back it flashed for like 2 mins and then went back to being still like before, should I be worried? I’m planning to sale out this car in about 2 months so i was thinking about going on with it till i buy it and not take it to mechanics again, its a pain
So I had worked done on my 2007 Honda civic car. I had the starter changed. And it ran well for two days. But this morning I had a check engine light. The car vibrates when parked and when driving the car jerks. Also there was strong fumes I could smell when inside the car. Could this be because of the same problem you explained here? Please help. Thanks.
@@RBTheMechanic ok, so yeah it’s ignition coiled #4 that’s failing. But now that I removed it the tip of the gasket stayed in there. Any ideas how to get it out? Thanks.
My car has that code, it does shake a lot, tons of smoke in the exhaust, and I think all the compression or whatever it’s called goes into the radiator line/hose. The coolant looks oily, I’m assuming oil is going through the cooling system. Does that mean I need to replace the gasket and have the heads redone?? And I algo get the code 0134. I turn the ignition on,press the pedal all the way down and takes about a minute to start.
@@RBTheMechanic thank you for your reply. Yes I think most likely the problem. Is that an easy or something doable at home? Let’s for diyers like me. Do I replace just the gasket or what else should I do? In case I try myself.
@@RBTheMechanic hi my fiend here I got an update and I thank you for your time in advance. Today I took the “terminal” I think they’re called those that go over or on the spark plugs. The kind of T form one. They’re dry, but they have a gas/water or gas/alcohol smell. The engine oil is clean, it has no sign of water in it or the milky looking. Hope you get a picture of what I’m saying. Is it normal to have the gas or gas with water smell in the plugs location ? It kind of smells like when you mix hand sanitizer with water.
@@ricardosom7766 well I understand what u mean but problem like this hard to state 100% some time it’s tiny amount and nothing will mix some times it’s only combustion pressure being pushed
I have a 2003 Honda civic with a check engine light with code P0304. I have replaced 4 spark plugs and 1 ignition coil for engine number 4. The check engine light is still on. what do I do now. Thank you
I thought I had bad coils until I changed all 4 with spark plugs and still have misfires while driving I also changed the crankshaft sensor and still misfires. I don’t know what else to check any suggestions???
When I'm driving the indicator come on if I off the car and start again it will drive for some minute sometimes it can drive up to an hour and I don't know where to solve the problem please direct me how to solve the problem
03 civic, persistent check engine light. Code 0302. Changed fuel pump, coils and injector for #2 cylinder. Car still stumbles on acceleration I have to floor gas pedal to make the car accelerate. I’ve spent $2000 on my car and I’m over it, any ideas I could try? Thx
@@mikejames8133 some will some wount well u can watch my egr valve videos cleaning it out. Or tap on it some time it start work work and function by impact or replace it It could be leaking vaccum
man i have an 08 civic and for some reason the engine light started flashing when i would accelerate, as long as i ease into it the light wont come on but when it does come on it loses acceleration power. i checked the coils by unplugging them 1 at a time and everytime i unplugged 1 it would almost stall on every one so idk what to do. can u help? it isnt doing any shaking or anything like that it only begins to flash when i try to accelerate at a decent speed
My 2002 Honda Civic LX has a P0303 code. I counted the cylinders from right to left to find the #3 cylinder. I swapped the #3 with #1 and it still shows the #3 misfire. Did I ID the cylinder wrong?
@@RBTheMechanic I changed both O2 sensors previosly and the light went off. When the guy checked my car for codes before "Inspection", while Check Engine Light was still off, it came up on his monitor that more than one code, 2 codes I beleive. So he told me it wasn't ready yet and I should drive around more before bringing it back for inspection. Unfortunately, the Check Engine Light came back on and I took it to Autozone and tested it and the P0303 code came on. ONLY that code. This leaves me to beleive that this issue is fresh. I just added K-Seal in hopes of catching this problem before it gets too big. The Head Gasket being the suspect. I'll kn0w tomorrow when I test drive it.
@@RBTheMechanic I disconnected the neg battery cable for a couple of days in hopes to clear any code. I'll reconnect on Monday and when the Check Engine light is off, I'll take it for a test ride and then check for more codes. I cannot see or find any reason for the code. So I'm hoping this will do it.
Help!!!! Changed coils and spark plugs, car misfires randomly, goes into limp mode, cel on, then car runs fine after a few mins, cel goes off, pleaseeee :((
Hey, boss, I have a 2018 honda accord sport 1.5l I changed all spark plugs and all coils still showing miss fire and cylinder 3 and 4.Could it be my fuel?ijectors are no good or my fuel.Pump is no good smh
I have same check-light flashing issue. I have changed all plugs but yet to change coils. Still flashing so I want to go back and change possibly all coils. I hope this stops. I haven’t been able to use my car almost two weeks cos of this issue.
@@RBTheMechanic I want to go back and scan it. Can oil result to misfire too? Because I saw you mentioned checking oil in some comments. But they said my oil is still alright though.
@@RBTheMechanic I just did scanning and it appears that one of my injector nozzles was bad. It showed P0304. I got it replaced. Cleared the error code, Drove it for like 20km but it did not flash check light throughout the testing process . My check light has been off totally. Normally it used to stay still even though nothing is wrong since my catalyst is not present. But after they removed the battery head, the checklight totally went off. It has not gotten back which is giving me some anxiety.
But later in the day after I finished washing my car, I decided to start the engine to check if there is any more misfire. As I started the car, the check engine light came back stable without flashing which my car has always been even without any problems. But a misfire sound came up before it settled after steaming for some seconds. It bothered me so I borrowed a scanner and checked again. It showed the same P0304. Which is pointing to the same cylinder. When you wipe an error code, does it really fix the problem or it just hides it for some moments? Because after wiping it during the day, everything was fine just that my check light was off totally, which was suspicious. Even though my car is alright, it normally displays my check engine light without flashing but steady. Which means it is working fine but there is no catalyst. But whenever the check light is totally off it usually comes up with something later. So should I just keep on wiping the error codes to hide the problem or change the injector nozzle on that cylinder again? Because I used an old injector nozzle which was in my boot. Maybe it was bad too which I’m not sure of.
While engine is running/idling, pull each spark plug wire off existing spark plug, one at a time. Soon as you notice no differential within engine idle, and-or engine running in general smoothly. You just located correct cylinder that's creating mis-fire. If you pull a spark plug wire off the spark plug, you notice the engine stumble, run rough, that designated/particular cylinder is functioning correctly for most part. Also if you touch your spark plug wires when engine is running, feel a shock, the wires are definitely in need replacement. Very highly probable, one or more spark plug wires are arching between each other, cylinder or cylinders not receiving full spark capability. Sometimes can see this arching, if it's dark enough within engine compartment. Spark plug gaping is also very important, spark jumping around the electrode within the spark plug itself, weak spark when piston reached tdc/top dead center. Piston reaching top within cylinder, spark timed to ignite fuel at this point.
This actually helped me figure out it was the coil pack I could unplug that one and nothing would happen the rest when I unplugged or disconnected a little bit the car would try to turn off
Great Job explaining ! Thank you for your help !
Got the code P0301 this morning, will be replacing the coil 1 this evening. Hopefully this works 🙏. Thanks for the video!
Oh ok
@@RBTheMechanic That was probably, maybe the quickest fix on a car I've ever done. Again, thanks for posting videos and keep up the good work!
@@gen1v1rev15 welcome
Best straight forward simple and well explain vid keep up the good work earned a Sub🤙🏼
Yup straight to the point thank u for watching
Thanks for video my car having the same issue 2012 Honda Civic lx, can it also drain your battery as well.?
My car is showing P0304 and has a rough idle just like in this video but when driving has no issues (maybe some power loss, haven't pushed it) and I've never had a check engine light pop up. So far i've changed the coil packs, spark plugs, injectors, valve seals and nothing has worked. My next step is to check the compression once I get a tester. Any idea what the problem might be? And if the compression is low in cylinder 4 what exactly could be the issue/fix?
Did I check compresson on cylinder 4
@@RBTheMechanic I dont have a tester yet but plan to do that next
I just started having this problem I drove the car home perfectly fine but when I went to move it the check engine light came on now I have codes P0303,p0301,p0303 an p0300 I changed all the spark plugs but now I’m starting to think it’s my coils an valve gasket any idea what it can be before I got out an buy all these new parts one of the coils had a lil drop of oil on it but the rest seemed to be fine it’s a 2010 civic 1.8l
Check ur oil also I seen oil dirty bad wrong viscosity and immediately on start up it will do that
@@RBTheMechanic I just put a new base pan an new oil on it so can’t be the oil
@@EhMaac oh ok did u use correct viscosity
@@RBTheMechanic yes
I’m thinking it’s the coils an a small valve gasket leak that’s the one thing I can think of
When I try to replace the spark plug on my civic 2009 P0302, I found oil all over the engine and the coil pack. I knew that I needed a new gasket cover but didn’t do it on time…now how can I temporarily clean the oil?
Use socket keep sticking in out clean socket over and over till u get as much as it can be possable then use tissue stick it down last of all remove the plug clean it out well
Had the engine light come on, cheap code reader gave it as cylinder 4 misfire, P0304. Swapped plugs and coil around with that cylinder with number two, still getting P0304. So obviously its not down to coil and plug. Its very intermittent, you dont notice the misfire, its certainly not down a cylinder. I can wipe the code and it will be ok for a couple of weeks, then the light comes back on, wipe it, and so on.
Did check engine compresson also check injector
THANK YOU
Would this process also work for a 2007 Hybrid Civic? Having flashing check engine light and some vibrations/stalling issues. Did have some of the coils/plugs changed by a mechanic a few months ago. If process is the same figured I’d take by auto parts store to get a code read on it.
Welll it’s similar but stall might be other issues
I have a 2006 civic, it’s saying cylinder 2 misfire, we replace the coil, still having problems. We’re gonna do plugs next, but when I get to like 60mph and then have to slow down and then give it gas again it starts jerking a little, and then on any sort of hill, big or small sometimes it will lose power and check engine light starts flashing, but I can pull over turn the car off and back on CEL will go off and it does fine for a few miles… I’m so confused on what it could be!
Flashing check engine is heavy misfire so do this change out the coil and plugs
I put brand new coil packs and sparks plugs in my 09 civic about two months ago and two days ago the check engine light came on..the sparks plugs are not gapped though I don’t know if that matters..and my cold air intake is dirty beyond belief
@@kiellieferickson5506 check the gap and why is the intake dirty?
Exactly my problem right now
I got a 02' Civic LX (non-vtec)
Recently got the Head Gasket replace and the Head Resurfaced. Mechanic claimed he changed the spark plugs also.
Then after that i had a misfire in cyl 4. (P0304),
Took it to my mechanic again and he replaced the coil, but he didnt replace the other 3. (Have no ideas why he did that)
2 weeks later i got the same p0304 misfire code.
Should i have the fuel injectors checked this time?
The car is at 196k miles.
Not sure injectors don’t go bad just like that I would check all basics first biggest issue is head gasket and head resurface
@@RBTheMechanic ok appreciate it man, thanks for the reply.
While is my honda civic 2006 making loud noise from engine when accelerating on low gear?
Ru asking me or telling me?
At autozone they said I have a misfire cylinder four sometimes the light flashes I had spark plugs put in last year. I drive a 2011 chevy aveo
Change the coil pack
@@RBTheMechanic my mechanic is putting new spark plugs in. I need to change the coil pack to?
@@savvyguy4180 most likely it’s the coil pack
Hey so I recently had my evap canister replaced and a week later I’m having cylinder 3 misfire issues. I changed my spark plugs, coils, did a check on the relays and they’re all making power. It’s a 2016 Honda civic, is this something you’ve ever encountered?
Didn’t replace
Coil on cylinder 3
My 2009 honda civic has P0300,P0301,P0302,P0303,P0304 code. I have taken this car to every mecanic in my area and no one has found the problem they dont know what it has, the car runs smooth but in a certain time the check engine light starts to flashing and when starts flashing the car losses power and when i turn it off it right away it goes back to normal but in a couple minutes it starts to do the same thing. I changed the sparkplugs and coils and nothing. Have you deal with this problem before? Can you tell me what can i do. Thank you so much for your time
Radon misfire and all cylinders misfire can be cause by vaccum leak or oxygen sensor can cause this I would try cleaning on upstream sensor also. EGR valve if it got one. And I’d ur oil grade and oil clean?
Please did you fix it. Please if you do, I want to know how because I’m having the exact problem.
Idk if you still respond to these but I’m having the issue where my 2001 civic ex will start good then as I drive it, it starts getting tougher and rougher till it eventually sputters out. I have codes: P0336 P1362 P0301 P0302 P0303 and P0300 any advice?
Ok u have code for crank sensor I would replace that and see where that goes and take the car and test drive it update me
@@RBTheMechanic thank you sir I will update you
@@RBTheMechanicso I haven’t changed the sensor but I unplugged it and took it for a test drive since I heard it’s sort of the same thing and nothing changed in fact it ran rougher. Should I still change it?
On a side note I don’t know if this adds to it but it smells like something is burning but I’m no professional so I couldn’t tell you what but it smells bad
@@stronknoob3084 I would replace it
I have a 2010 honda accord 3.5 liter the scan said missing on all cylinders and vsa light keeps popping on and off what's your thoughts on my situation
Well did u check ur oil level?
One of mechanic did the spark plug swap and found the code still on. Then he told it might be the valve and he wanted to adjust the valves. But then I showed to another mechanic and he observes that my gasket is loose and there is oil leak also he said oil leak is causing that. Now I am confused whom to believe. What do you think. Thank you
Well which gasket did he say? Oil in spark plug would cause misfire
My engine light keeps blinking and i put a scanner and got the code p0301 it says DTC severity 2 of 3 repair immediately if drivability issues are present
That’s misfire cylinder one replace coil and spark plug also these new civic have issue with injectors. Flashing light is heavy misfire
@@RBTheMechanic thank you i change all 4 spark plugs and new ignition coils now its running good its a 2002 honda civic ex
@@franciscomexico7131 nice job!!!!
@@franciscomexico7131You are lucky. I have same check-light flashing issue. I have changed plugs but yet to change coils. Still flashing so I want to go back and change possibly all coils.
if there’s oil in it when i bring them out what should i do???
U have to clean it up very well and then know this if there’s oil then the gasket is no good u need to replace the gasket
What if I change my spark plus. But I didn't change the coils
Well mostikely it’s bad coil if u got misfire
Ya but what if I changed all of that and did the swap test but still have the misfire
Did u check or change oil some time it’s caused by oil bad also moniter misfire with scan tool
@@RBTheMechanic no but I was gonna change it today.. because I was reading that yesterday
@@jeremybell5745 ok
Spark plug?
@@ashveensharma5468 could be plugs coils injector or somthing else
My Honda Civic 2016 has code p0303 while driving all dashboard lights went on, changed the sparkplugs & coils and was good for some days then it happened again, any guess? Thanks in advanced 🙏🏻
Scan the car for all moduel
Did you find out what it was? Mine is the same :(
What if all the cylinders are misfiring?
Check vaccum leaks
It'll have P0300 Random multiple misfires...Usually needs plugs and or the piston rings are worn letting oil past the them to foul the plugs..Crank shaft or camshaft sensor..Distributor,coil or related parts if not coil on plug like newer engines..Water running down in where coils are from bad weatherstripping along the cowl or rear of hood...Usually a certain car will have a certain problem when the P0300
So I have code P0301 2008 SI
I did the coil test so my bad one , cylinder 1. I swapped it with cylinder 3. It still reads that cylinder 1 is misfiring even though I swapped it so it can’t be coils.
I put brand new spark plugs I don’t think that is it either.
Could it by my fuel injector?
When I remove the coil from cylinder 1 it makes no difference. No matter which coil.
Same thing with injectors. ANY idea?
Swap the plugs also u never know and check the spark plug gap. After that u need to check injector and coil Paula’s and compressor for engine
How about u have misfires on all 4 cylinders ?
Check ur oil lever first and scan the car for codes possability low or vtech not working or EGR valve is possability
Thanks a lot 🤙🏼
You welcome!!!
@@RBTheMechanic I replace the coil pack and spark plugs but still have misfired what I’m gonna do.
@@d3mb3 switch the coil to diffrent cylinder see if the misfire changes to that cylinder double check the gap of ur spark plug
bro I got a code p0303 it has rough idle and like a consistent tapping and a popping sound and lose of power and white smoke
That’s misfire do tune up swap the coil from cylinder 3 to another cylinder see if the misfire changes to diffrent cylinder. These cars are known from ba do hector and seals causing misfire
@@RBTheMechanic i have a 2001 eclipse rs 16 valve 4 cylinder thats what im about to do now but say if its not that what could it be?
@@RBTheMechanic I have same issue code ps301 Cylinder 1 misfire. Swapped coil from cylinder 2 to cylinder 1 and the same code po301 remains. Do I need to change spark plugs?
Hey, bozz, I changed my maf sensor my coils, my spark plugs my fuel injectors. Now I'm getting a misfire in cylinder one and also throwing a code. U0401 - 68. I move the spark plugs around. I move the coils around still cylinder. One misfire with the code U. A 401 -, 68, can you please help? Thank you very much
What was the issue before doing all this
The issue before it was shaking rough idoland it just was like losing power. So, then I did a lot of research here and there and I changed like I said all the stuff I changed, so I got to the injectors and I thought that's the last thing I probably gotta do and yes, when I took him out they were really corroded and so and that's all. I did. I took out the injectors, put them back the way they said didn't touch this or that and? Pretty much that was it.I just can't figure it out
I replaced both the spark plug and the coil and the car stalled when I drove it. It completely turned off. What should I do?
Well the stall need to be figured out anyways when dose it stall when u come to red light or stop sign? What is ur idle rpm once the car is cold. I would do throttle cleaning service to get this repair started
I have the same code on my 2017 Hyundai accent I changed all four spark plugs and all four ignition coils still having the same problem. What could be the issue now?
Check ur oil level? And see if it’s clean as well? It could be oil since these engines change timing with oil pressure
@@RBTheMechanic Amsoil full synthetic every 5000 miles. I was thinking probably fuel injector, but I am averaging 41.2 miles per gallon highway at 80 mph in Utah. What else do you think it could be?
@@aayonazizi747 vaccum leak?
I’ll check it out. Thank you sir.
5:37 HELP!! Code- P0302-11
So far: Engine coil replaced- tried changing them between each other- same code- tried swapping the spark plugs, engine 2 again
Ordered replacement plugs, jic, but I’m worried b/c I already checked by swapping.
Any suggestions?
What year make model?
Mine misfire with CEL flashes only in a cold start. When it reached the optimum temp, the CEL flashes went away and misfire dissapear. Any idea?
Hook up ur scan tool and scan for codes and check live misfire data on cold start up
I started with a misfire on 2 and 3 and I changed the cylinders and a few days later i had a misfire on 3 and changed that one out and for a few weeks I had no issues but today the issue came back in 1.2. and 3. What do I do now??
Start with doing basics change out plugs and coil and reset the light also do oil change use good oil the vtec works off oil dirty old and low oil can cause this type of issue
Is it odd that the issue starts with misfire in P0302 and P0303 and I fix that issue and it comes back at P0303 and I address that issue and a few weeks later it now comes back in P0301,P0302, P0303...Oil was changed in May of this year and the coil packs were replaced earlier this year and not because I had issues at that time, I just thought it be good to change them when I was doing a tune up this past spring... I noticed this latest issue last night when I started the car up I seen the engine light flash a few times with a low vibration, and it stopped and the engine smoothed out when I drove off to head home. It only acts like that at start up..
Brother I'm having a awful time trying to figure this out. I hooked up a obd2 reader because our truck "only vehicle" isn't running very well. I received codes po300 all the way thru po306 "all cylinders" misfire.
Last month i replaced all six plugs and all six ignition coils. I also codes po404 po420 and po430
Some codes was on there twice even. The truck ran great before and now it'll run but we are afraid to drive it. My father inlaw thinks it's a clogged catalytic converter. The truck is a 2008 Honda Ridgeline What do you think?
Amy help is greatly appreciated, God bless...
Me, I'm not a mechanic i just figure out what's wrong then i fix it. I'm lost on this...
This could be vaccum leak highly possability bad egr.
@@RBTheMechanic is there a way to test it? We have no way anywhere now and we live on the country.
Neither i bought a new egr and put it on. Yesterday the obd reader gave me 14 codes. Today it gave me 4 codes of po300, po301, Po302 and po306. That's a huge difference. I'm wondering now if I should change the idle air control. What do you think?
Again thank you my friend, God bless...
@@RogerPaul-planetx-nibiru u can take it off and block the ports with ship I use to do that
I found out has a idle speed control that I cannot clean but I can replace. Today I put on the egr and took off the throttle body and cleaned it. It got up to 6 or 700 rpm where it was on like 4 or 500 so that's a small improvement on that. I'm thinking I might ruin some sea foam through the throttle body and see what hairball at this point. I'm also thinking I might have gotten some bad plugs or or coils from the auto parts but not sure. I'm also gonna see if I can clean the catalytic converter. I'm thinking it might be clogged enough from all the carbon because i did get quite a bit of soot from the tailpipe. What do you think?
I thank you much for taking time to reply brother, God bless...
Mine turns on idles roughly, then when I go into drive it turns off completely already changed the bad spark plug and coil which were the only ones failing now I have p0300-p0304
Did u try using gas peddle to keep it alive? It might be idle issue clean throttle is a start
It happened to me for the first time today, my battery used to die on honda civic 2007 cus there was some short circuit which drained battery so got it fixed from the mechanic, on my way back I noticed the check engine light flashing (i always had check engine light on for like 5 months but its always still so i ignored it, today on my way back it flashed for like 2 mins and then went back to being still like before, should I be worried? I’m planning to sale out this car in about 2 months so i was thinking about going on with it till i buy it and not take it to mechanics again, its a pain
Scan the check engine for codes and if u got misfire code fix that cylinder change plugs and coil is a start
So I had worked done on my 2007 Honda civic car. I had the starter changed. And it ran well for two days. But this morning I had a check engine light. The car vibrates when parked and when driving the car jerks. Also there was strong fumes I could smell when inside the car. Could this be because of the same problem you explained here?
Please help. Thanks.
No this might not be related to starter change but did u get check engine?
@@RBTheMechanic thank you for replying. I haven’t yet. But I will today. Thanks again. 👍👍
@@RBTheMechanic ok, so yeah it’s ignition coiled #4 that’s failing. But now that I removed it the tip of the gasket stayed in there. Any ideas how to get it out? Thanks.
Just bought a 1999 Honda Civic ex it’s shaking and has check engine light flashing drives
That’s a misfire scan the car for codes
My car has that code, it does shake a lot, tons of smoke in the exhaust, and I think all the compression or whatever it’s called goes into the radiator line/hose. The coolant looks oily, I’m assuming oil is going through the cooling system. Does that mean I need to replace the gasket and have the heads redone??
And I algo get the code 0134.
I turn the ignition on,press the pedal all the way down and takes about a minute to start.
From what ur saying u have bad head gasket
@@RBTheMechanic thank you for your reply. Yes I think most likely the problem. Is that an easy or something doable at home? Let’s for diyers like me. Do I replace just the gasket or what else should I do? In case I try myself.
@@ricardosom7766 first I’m not sure if that is the issue I’m only saying from what u stated and It’s not somthing u can do home
@@RBTheMechanic hi my fiend here I got an update and I thank you for your time in advance.
Today I took the “terminal” I think they’re called those that go over or on the spark plugs. The kind of T form one. They’re dry, but they have a gas/water or gas/alcohol smell. The engine oil is clean, it has no sign of water in it or the milky looking. Hope you get a picture of what I’m saying.
Is it normal to have the gas or gas with water smell in the plugs location ? It kind of smells like when you mix hand sanitizer with water.
@@ricardosom7766 well I understand what u mean but problem like this hard to state 100% some time it’s tiny amount and nothing will mix some times it’s only combustion pressure being pushed
I have a 2003 Honda civic with a check engine light with code P0304. I have replaced 4 spark plugs and 1 ignition coil for engine number 4. The check engine light is still on. what do I do now. Thank you
U have to reset the light it wount turn it self off use scan tool to reset it
I did but then I drove about 10 miles and the check engine light came back on. still code P0304
I changed the ignition coil for engine number 3. It still shows code P0304
The machine runs very well and does not vibrate
@@suongle5290 po304 is misfire cylinder 4 not 3
I thought I had bad coils until I changed all 4 with spark plugs and still have misfires while driving I also changed the crankshaft sensor and still misfires. I don’t know what else to check any suggestions???
Which cylinder is misfiring? What brand spark plugs u put it. Get me the misfire code
@@RBTheMechanic P0301 P0302 P0300
Ngk spark plugs
@@heaxysauxe6536 u got random misfire did u put scan tool on to see live data to see if it is misfiring
@@RBTheMechanicPlease poster come and respond to this. I’m trying to figure out similar problem too.
Honda hybrid 2007 I change all the spark plugs and coils and still getting miss fire . I can’t pass smoke check 😂😢
What’s the codes?
When I'm driving the indicator come on if I off the car and start again it will drive for some minute sometimes it can drive up to an hour and I don't know where to solve the problem please direct me how to solve the problem
Scan the car for codes
03 civic, persistent check engine light. Code 0302. Changed fuel pump, coils and injector for #2 cylinder. Car still stumbles on acceleration I have to floor gas pedal to make the car accelerate. I’ve spent $2000 on my car and I’m over it, any ideas I could try? Thx
Did u check to see the EGR valve
Will a bad egr throw a code? How do I check it? Thanks
@@mikejames8133 some will some wount well u can watch my egr valve videos cleaning it out. Or tap on it some time it start work work and function by impact or replace it It could be leaking vaccum
Ok thanks RB, I’ll purchase a new one to be sure. I appreciate your quick response.
RB, are you a fan of Seafoam, I’m tempted to want to try it, I can’t help but feel it’s a fuel related problem.
did you fire the Curvy The Car Girl , man she thick like a 6 pack. i am leave in the morning to new jersey for thurday auction. where your shop is at
man i have an 08 civic and for some reason the engine light started flashing when i would accelerate, as long as i ease into it the light wont come on but when it does come on it loses acceleration power. i checked the coils by unplugging them 1 at a time and everytime i unplugged 1 it would almost stall on every one so idk what to do. can u help? it isnt doing any shaking or anything like that it only begins to flash when i try to accelerate at a decent speed
Did I scan for codes also look in to memory codes flashing light means misfire also check ur oil level
@@RBTheMechanicmy oil is good but it still stalls when I try to accelerate?
@@im2nyccodm500 what is ur rpm maybe cleaning throttle will help
My 2002 Honda Civic LX has a P0303 code. I counted the cylinders from right to left to find the #3 cylinder. I swapped the #3 with #1 and it still shows the #3 misfire. Did I ID the cylinder wrong?
Did u reset the light?
@@RBTheMechanic I changed both O2 sensors previosly and the light went off. When the guy checked my car for codes before "Inspection", while Check Engine Light was still off, it came up on his monitor that more than one code, 2 codes I beleive. So he told me it wasn't ready yet and I should drive around more before bringing it back for inspection. Unfortunately, the Check Engine Light came back on and I took it to Autozone and tested it and the P0303 code came on. ONLY that code. This leaves me to beleive that this issue is fresh. I just added K-Seal in hopes of catching this problem before it gets too big. The Head Gasket being the suspect. I'll kn0w tomorrow when I test drive it.
@@Justjack613 that cylinder 3 misfire maybe the codes he got was memory codes
@@RBTheMechanic I disconnected the neg battery cable for a couple of days in hopes to clear any code. I'll reconnect on Monday and when the Check Engine light is off, I'll take it for a test ride and then check for more codes. I cannot see or find any reason for the code. So I'm hoping this will do it.
@@RBTheMechanic I'm not sure I understand what a "memory code" is.
Help!!!! Changed coils and spark plugs, car misfires randomly, goes into limp mode, cel on, then car runs fine after a few mins, cel goes off, pleaseeee :((
What’s the cel code?
@@RBTheMechanic P0352
@@prasanna4061 dose the scan tool give u definition cuz I don’t have it in my system
@@RBTheMechanic no 2 cylinder ignition coil circuit malfunction
@@prasanna4061 primary ? Secondary?
Mine misfiring and there’s oil on the coils. I had the car since 2019 and it misfired 2x this year
U need to change the valve gasket
@@RBTheMechanic thank you
Hey, boss, I have a 2018 honda accord sport 1.5l I changed all spark plugs and all coils still showing miss fire and cylinder 3 and 4.Could it be my fuel?ijectors are no good or my fuel.Pump is no good smh
I don’t think it’s the pump is it still showing misfire or u feel misfire shake
@RBTheMechanic missfire 3// 4 cylinders could it be my oxygen sensor showing code p219E
Thnk you for the info boss have a gud Sunday
@@tatuado5875 welcome
@@tatuado5875 I have had that oxygen sensor being the issue upstream sensor
i have p304 but when swapped around the code didnt change ):
Check the plug and check compression in engine and check injector for performance
VG inf thanks
He works for curvy girl or dat her husband. The shop look likes her too
No she friend she use my shop it’s cool
OK DIU WIT WUT JEUG
LPEUT WIU AUY JEUY
JOWYG EOU AWEZD HOWYR
LPET EIT RIH
What????
I have same check-light flashing issue. I have changed all plugs but yet to change coils. Still flashing so I want to go back and change possibly all coils. I hope this stops. I haven’t been able to use my car almost two weeks cos of this issue.
This flashing means serious misfire what codes did u get?
@@RBTheMechanic I want to go back and scan it. Can oil result to misfire too? Because I saw you mentioned checking oil in some comments. But they said my oil is still alright though.
@@TamImBlessed yes inside the spark plug bore if there’s oil it will misfire
@@RBTheMechanic I just did scanning and it appears that one of my injector nozzles was bad. It showed P0304. I got it replaced. Cleared the error code, Drove it for like 20km but it did not flash check light throughout the testing process . My check light has been off totally. Normally it used to stay still even though nothing is wrong since my catalyst is not present. But after they removed the battery head, the checklight totally went off. It has not gotten back which is giving me some anxiety.
But later in the day after I finished washing my car, I decided to start the engine to check if there is any more misfire. As I started the car, the check engine light came back stable without flashing which my car has always been even without any problems. But a misfire sound came up before it settled after steaming for some seconds. It bothered me so I borrowed a scanner and checked again. It showed the same P0304. Which is pointing to the same cylinder. When you wipe an error code, does it really fix the problem or it just hides it for some moments? Because after wiping it during the day, everything was fine just that my check light was off totally, which was suspicious. Even though my car is alright, it normally displays my check engine light without flashing but steady. Which means it is working fine but there is no catalyst. But whenever the check light is totally off it usually comes up with something later. So should I just keep on wiping the error codes to hide the problem or change the injector nozzle on that cylinder again? Because I used an old injector nozzle which was in my boot. Maybe it was bad too which I’m not sure of.