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2004 CHEVY SUBURBAN 5.3L P0300 DIAG & FIX
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- Опубликовано: 8 окт 2018
- Thank you for tuning in to Super Mario Diagnostics!
We've got a diagnosis of a random misfire, that may throw off some. It can be easy to be led by the symptom, and not focus on the cause.
I hope you all enjoy, like, share, and subscribe!
CHANNELS YOU SHOULD BE WATCHING:
SCANNERDANNER
NEW LEVEL AUTO
PINE HOLLOW AUTO DIAGNOSTICS
KEITH PERKINS
TRAINED BY TECHS
FLAT RATE MASTER
POSITIVE LEAD DIAGNOSTICS
S & A AUTO REPAIR
DIAGNOSEDAN
OZ MECHANICS
ROBINSONSAUTO
SEAN MILLER
SOUTH MAIN AUTO REPAIR
Supermariodiagnostics@yahoo.com
Facebook.com/supermariodiagnostics
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thanks for the shout out brother. keep up the great work. i can say scanner danner was the one that inspired me to make videos and got me into doing electrical diagnosis.
Well deserved brother. Thank you! Gotta say, scanner danner has really gotten the wheels moving for a ton of techs! He's done great work 👍 same here, he got me started on electrical as well
Being able to go out-of & into closed loop is quite handy! New to me, never knew that was possible on some brands!
Back to watching!
Thanks for showing whole repair. Thanks for taking the time. Very informative.
Great job man!!! So many great technicians mentioned I'm honored to have made the list.. that open/closed loop switching was an awesome demonstration!!! Nailed it my friend... Thanks for taking the time and sharing!
Thanks Will!! Gotta give credit where credit is due bud 👍 thanks for checking it out 😉 glad you enjoyed!
@@SuperMarioDiagnostics what scanner is that
You make a good point that more specialized problems leads to a more narrow audience. However the internet is a strange thing. I never would have thought that some channels, like obscure math channels, would draw such a massive audience. In this rapidly growing arena of computer diagnostics, online learning is a great way to expand horizons.
I wish I could have seen this video earlier I have a 08 Silverado with a 5.3 that was doing the exact same thing I took it to a local mechanic and he told me I had a bad lifter well after $2k my truck still doesn’t work so I got smart and went out and got my own scanner and thanks to your video I now know how to find my problem
Your such a good man,good attitude;very humble,great video
Excellent list, loved this video as always!
Keep on making videos brother, your an awesome technician and are doing great work!
just came across your channel the other day and got to say great job, i'm also watch every body you named and some you named i have to check out. I'm across the way here Cape Coral fl. Keep putting out great video's like this diag one. Every body knows how to change spark plugs. Great job bro !
Much appreciated Bill! I'll keep them coming 👍
Your list has alot of the ones I've watched and a few more I didn't know about. Keep up the good work, Mario.
You just included my name with the best in the industry. I'm not worthy. I'm humbled. I have a lot to learn yet. Thanks pal
It's this kind of humility that makes you a great tech! We all will always have a lot to learn buddy, but you're sharing your knowledge and experience bud. This industry needs your exemplary contribution! So thank YOU for everything you put into your work buddy. And keep it coming! 😃
Thank you Bro., I have a 2006 Suburban 5.3 with the exact same diagnosis and now problem solved, I like the way you walk through the diagnosis know one could have done better
dude let me say that video was awesome i learned alot ..from start to finish ..and the shoutouts was important as well.. like you said sharing the knowledge now i know some other guys that i can check out as well ..and yes scanner Danner is awesome looking into taking classes soon when he gets back into Rosedale...loved the whole video ..thank you for the lesson.
Im getting into diagnostic and started watching your videos ive learned alot from you man! Thanks!
That's great buddy 👍 glad i can help!
Thank You First of All, I'm not a Mechanic Taught by Trade School, Just a Simple Shade Tree Mechanic, I Got 30 years of Working as a Automatic Screw Machinist. I'm Dealing with Learning these Codes on a Cheap Harbor Freight OBD2 Scanner, and when I find and Fix the Problem Something Else Pops Up. I should of Learn Diagnostic instead of Aero Space Work. I'm having a Misfire Problem and Bought all Plugs, Wires, one Ignition Coil, Compression testing, Injectors Working Clicking, Still Need to Fuel Pressure Test, 02 Sensor Testing, Monitor Short and Long Fuel Trims, Still Narrowing it Down. Thanks For Sharing Your Information to Help and Educate The Novice, Thank You Etc. Blessings Sent, The Shade Tree Mechanic.
GREAT video Mario . I am a retired tech of 35 years . refreshing to see such professionalism . You are good my friend . people really appreciate that , keep up the good work and keep the video's coming. B-rad.
Thanks for taking the time buddy! Glad to have ya. Much appreciated sir
First of your videos I have watched. I subscribed as well. Humble and informative. Great job.
Thanks Douglas!
Yup it all started with ScannerDanner for me too! Nice diag Mario. I've never seen anyone switch from open to closed loop with a scantool. Very cool. Thanks!
Yep not every car has the option, very neat to have:) thanks buddy!!
I have the identical scan tool so these videos are particularly helpful. Great work!
I just ordered the same one Autel I IM608 it’s a great tool.can’t wait to get my hands.on it.Spend the extra money and get it from Curtis Hardin
Out of South Africa. He offers full support on the software and hardware it is worth it.
Amazing video. Been fighting my misfire for two weeks now. Replaced all 8 coils plugs and wires, fuel filter, throttle position sensor. Nothing worked. I replace upstream o2 sensor and boom runs like a dream
Timing?
Awesome video! Very informative! Thanks for sharing!
Great job with putting the vehicle in open loop. Really enjoying your diagnostics
Thank you Richard! Glad you enjoyed!!
I didn’t know the Autel had that special function. Thanks now I can check that out
Thank you I been working on my Chevy Tahoe 05 been having missfire I think I'm go get O2 sensors wish me luck otherwise I have appointment Tuesday at shop.
Ya man.. Cause n Effect is in play here. 🤔😜
Didn't exactly get to load test the wiring like you want when the test bulbs go wonky. Lol
Good run down of all the inspiring channels..fully agree with you. All of them inspire me as well and learn from them too. Rock on Mario..Keep them rollin. Cheers Bro
Great list of channels!
Great video! Thank you for sharing!
I just found your Channel thank you for making great videos!!!!!👍👍
Mario contador respeto me gusta tu forma de pensar y de compartir con la demás gente gracias por tu ayuda y el apoyo a tus otros compañeros si todos pensamos igual que tu este mundo seria otro muchas gracias 👍👍👍
Nice tutorial great help, thanks Joel
P0300 my yukon had was a dead ignition coil pack replaced it no more misfire, rough idling or smell of rotten eggs.
👍👍👍. Nice one Mario. Nov.2017 my whole life changed when I went on scannerdanner premium as well. Then the whole RUclips with the great guys u mentioned just expanded it to a whole other level. But Paul is what allowed for me for that door to be opened. I can't ever be grateful enough for that Man. Nice video though. I too when I see 02 codes with misfires was taught is the misfire the cause or the effect. Nice to point out the black wires for the 02 heater circuit. But question are all the 02 sensor with black wires the heater circuit? 🤔🤔 Knowing that will help other people with the wiring. I remember I had one 02 sensor chewed off completely from the harness side, not the 02 sensor and those harness connector wires are not ur standard white blue and 2 black wires. But knowing which one was what helped me with looking at the wiring diagram to re wire them correctly. Knowledge is power and with these great techs on here anything is possible. Keep doing ur thang brother god bless
Not all oxygen sensors are clack wires for the heater circuit, so always refer to the diagram! Thanks for watching and commenting Jason!!
I watch more channels here on RUclips, than I do in cable 🙌🏼 Great video dogg 👊🏼
Thank you Hector!
🤣🤣🤣. Me too. I watch more here than actual cable. Are we weird?🤔🤔🤔
What's cable? 🤣
@@SuperMarioDiagnostics U are to much 🤣🤣
Lol same!
I love the deep stuff people taking engines apart I'm the same I learned alot from RUclips
👍👍👍👍👍
Another great fix!
By the way, thanks for the "to watch" list. I need to check out a lot of these guys.
Thanks 100! Check them out, you won't be disappointed!
I tell you one thing Eric O from South Main Auto is the best hands on mechanic on youtube.
He's a very sharp dude, and has a way of getting the info across that not allot of ppl can do so effortlessly. I don't think it's really about who's the best, but instead a collective resource. It's good to learn from as much techs as possible.
@Richard Gill thank you so much for letting us know your opinion.
Started watching Eric o then Eric the car guy then scanner danner then this guy super mario diagnostics learned alot from all of them
Eric is good, but I don't think anyone is more advanced than Ivan at pine hollow auto diagnostics. That man gets the hardest cars to work on I've ever seen and he nails them every time
DUDE! I just realized when I went to check on your videos to see why you haven't had anything up in a while it had me UNSUBSCRIBED!! Man I have some catching up to do now! Oh and I re-subed ;)
Rust!? Ahhh come on man don't knock it till you try it! You'd love it!
It's an honor Eric! 👍 truly is! I did Have a good share of rust on a jeep liberty today, guess whose tips I kept in mind? 😉
I learned a lot from you in this video thank you you help me fixed my truck bout to subscribe
Thank you for going into detail
I love how scanner Danner was first lol. I learned so much from that dude crazy. First starting out on di work he was the go to for me. I'm sure your list isn't ordered in anyway but It just caught my eye
Well scanner danner is the only one in order 🤣 he's the man! If it were not for him, I'd be a lube tech still. Thanks for watching!
Well scanner danner is the only one in order 🤣 he's the man! If it were not for him, I'd be a lube tech still. Thanks for watching!
The open loop to close loop switching is great. Nice one Mario - great techs on youtube there.
Thanks Steve, yes plenty of amazing techs out there to check out, thanks for stopping by 👍
Mario. This Steve Rob guy is trouble 😂😋 actually he is one of the most loyal supporters you'll find on youtube! Steve has done well~ coming from a peanut farmer ;) inside joke
Yes i see that, i have no idea how he found me, but he is a model subscriber. He is a bit on the wild side 😉 but that's whats so cool about him 😎
Good test tip. Thank you for sharing.
No problem Andrew!
Gracias broder buen bideo bien explicado
Great information “ thank you
Hi Mario. Thanks for sharing your knowledge.
I need your opinion on this. I Hebe a 2001 Chevy Silverado 1500 5.3 and I heave a po300 miss fire, I have already changed the 4 h2 sensors fixed a manifold problem that the scanner indicated me, I replaced the coil packs, the spark plugs and the cables And the fuel filter.and i still have the po300 miss fire problem.what do you think is wrong with my truck? I will appreciate your opinion. And thank you for your opinion in advance.
Pro gentleman good communication 👍🏽
I am fighting a p0300 on my 07 4.8L Chevy, that's my only code and my misfire counter is showing misfires on cylinder 6, 7, and 8 (torque pro app). Thing is my status is showing that computer is only using 1 o2 sensor for feedback as it says in a closed loop feedback fault. And ideas I'm thinking head gasket or computer since I changed both sensors to new oem.
Great job and excellent diagnostic
Thank you sir
thanks Mario I feel the same about paul danner , I been follow this guy for almost 5 or 6 years and he make me better tech, there is no way to pay him back,and the rest of the guys also they great I follow all of them , check ivan of pine hollow auto diagnostic , he is good too, but totally agreed in everything you said , thanks, keep the good work
Thanks Felix, yes I had Ivan in my list but totally forgot to mention him. All great techs!
Thanks bud nice work not shure why they dident fix the wire ?
I gotta do all my o2 sensors. One of my connectors got ripped out some how and now I gotta replace it. Sucks cause it's the one from the harness.
love your channel. thanx
great videos Mario, very thorough
Thanks Sergio!!
Gotta give you thumbs up for mentioning all these channels and sharing the knowledge, respect man.
We have found some Toyota's use the rear o2 sensors for feul trim as well, through us for a loop until we figured that out.
You are absolutely right, usually the cars that have them tend to have a extra pid for them. Thanks for swinging by!
Voltage drop diagnostics is another great channel
Great job!
Great job keep it up
Good info thanks
Mario what brand 02 would you prefer to use? Ive got a Bosch thats been on for about 2 months getting heater code on it and P0300 code also
Hey i got a 05 bank 1 sensor 1 code on it runs horrible po300 code could the o2 cause this?
Que tal espero y este bien alo que pasa que le cambie las cabezas a una silverado 2005 porque pasaba agua pero después me prendió la luz y es el código p0300
Great video thanks
Great job bro
You forgot to mention how funny all these guys are too
Great Diag bro. And yes Train Train Train.
Thanks Miguel! That's right!!
Oh man, having bi-directional control was very helpful in this case. Did you say your using the Autel 908? I love the list of techs here. It's been years since I've watched TV. The best programs are right on RUclips. I'm researching a can bus problem for a friend so I'll go over to Diagnose Dan and see what he's up too. You make a good point about getting views. The most watched video I have is "How to check transmission oil level on a Dodge". Great video Mario.
Yes I'm using the maxisys 908. Diagnose Dan is the man, great stuff! Sadly the general public will flock over the easiest things, maybe someday that'll change, as cars get even more complex lol maybe not. Thanks for watching Wyatt!
Did you change the sensors on both banks( upstream)?
Good video. Don't forget *Ivan* from _Pine Hollow Auto Diag._ .
I had him on my list, and he's the one that led me to Keith defazio. I don't know how i missed him. Thanks!
Gracia por la información.
Very nice brother. How many guys you know that would have completely disregarded o2 operation here and threw all sorts of parts at it?
Very easy to get swayed, that's why i share these little details, damage control of the industry 🤣
My suburban was doing the same thing same codes and i was told by pepboys it was the intake manifold, i replaced it with a brand-new one with gaskets, took it back pepboys, its the knock sensors, change those, took it back to pepboys, its the ignition coils. Now I know they didnt do any diagnoses like this mechanic did. Im out $243 and still have the same issue p0300, and pepboys offered to fix it for $891 when its probably just oxygen sensors
That's a shame. Take it elsewhere. Where are you located
Thanks for your video but you forgot Ivan at Pine Hollow Diagnostics young and brilliant!!!
I had him in the list lol i don't know how i missed him 😳
bout the time i think i have it figured out, someone who knows what their doing comes along
Hey Mario, I've got a 2010 silverado, it has 18 psi key on engine off, after initial prime, psi goes to 0 immediately. It takes a couple cranks to start the truck. And the truck runs at 18 psi. It sets several lean codes. And runs rough. I tested fpcm, pink ignition feed and it was 14.2v running, red with white tracer B+ was also 14.2 running. Then i tested the thick grey wire that is positive to fuel pump. Truck running and idling it was fluctuating between 11.4 and 11.9v. The pink ground to fuel pump was .20mv. Now here is where I'm confused, the battery voltage was 14.2 running. The power feed from fpcm to fuel pump was between 11.4 and 11.9v i know the pump is bad because the check valve is not holding pressure, key off pressure drops to 0 immediately. Was the grey wire power feed to fuel pump supposed to be battery voltage 14.2 or was the 11.4, 11.9 good? My understanding, and i may be wrong is the regulator is built into the pump and the pump is pulse width modulated to increase pump speed to build more pressure or less pressure depending on fuel rail pressure sensor and fuel demand. I called the pump on this truck but I'm questioning myself on the fpcm. Any help would be much appreciated. I'm very green at diagnostics and want an experienced opinion. Because if the 11.4 and 11.9 were supposed to be battery voltage then this truck will need a fpcm also. Thank you in advance for any help!
Oops i read that wrong. Your supply is good to the fpcm. You'd have to command the fpcm to 100 percent command and recheck. Most pwm fpcm won't supply full 100 percent command at idle. I don't think you have anything to worry about if your duty cycle matches your life data pid command percentage
thanxs for making this vid.
You're welcome!
How do you like the Micsig scope? Looking at the UScope but it’s only 1 channel might be enough for what we do at our shops. Also looking at the Snap-on Vantage ultra.
The Pico looks really nice just sure if I’ll have space to have the PC stuff at my current shop
I loved the micsig, while it worked. Huge let down when it died. If at all possible, try to get four channels, bare minimum 2 channel in my opinion. Thanks for watching! Happy New Year!
Super Mario Diagnostics micsig broke? Damn
What up,my problem is PO304 new sparks plugs cables also coi and throudle cleans.check engine and car sliding lights still on?
Is it still misfiring after codes have been cleared?
Do you own a scope? It could be an injector or engine mechanical
Hello, nice video. Which Autel Scanner are you using?
Autel ms908
Great video as usual Mario! I've been hearing about super saturday alot. Can you elaborate? What is it? Where is it? Are people like me noob able to attend? Thank you! Thumbs up as always!
Thanks bud! Super Saturday is a world class training day in Pennsylvania this Saturday. Any one can attend. You may want to stay tuned tonight
ruclips.net/video/XwMLr2NYzNA/видео.html
I'd be stoked to meet you there bud!
buggyalstare1971 also check this out
diag.net/msg/m2dej4pmax0wiexhvvbzfywnnt?m=m75x6pufk7y8e325hnigtb74d4
And this
paautotraining.com
@@SuperMarioDiagnostics awesome! Thank you for sharing the info! I'm definitely looking forward to this evening! I hope to see you there as well!
Just described brother and do you have knowledge about front suspension on a 2004 2wd. 4.8 ? If so what would be best a level kit or a lift kit I kinda want the truck higher so I can haul a camper trailer it's a weekender and the rear is kinda to low I'm going for rough country kits and on a monthly fixed income budget $ 600 doesn't go far at all I'm just having to put a little back to build up some funds because it's my only transportation
I don't know anything about lift kits
@@SuperMarioDiagnostics that's ok bruh I got a local company that does that they want to charge me $ 500 in labor to install a 4.5 inch rough country lift but dam $650 for the lift kit is understandable and dat $ 500 labor is ridiculous to me if I wasn't 55 years old I'd do it myself 😁
Great video, what is the diag tool you're using? Looks really good
Thanks! I'm using the autel ms908
Super Mario Diagnostics I thought it was the Autel IM608 I think they have the same software anyway.
That was a year ago. Now i use the 608
LOL... my loadpro pins are also bent! =)
I am curious, and I know this is an easy question. But do you always test with a grounded test light on the heater circuit to find the 12v power then you know the other one much be the switched ground and can apply 12v through testlight to test? Otherwise if you go in with testlight hooked up to 12v do you risk shorting something out?
No it won't short, the pcm would give a code for a short if there was one, and likely shut the circuit off until you clear the code.
There's no risk as long as you know which wire you're probing
@@SuperMarioDiagnostics awesome thanks. Basically look for the two black wires on a 4 wire o2 sensor and you know those are probably heater circuit? Or just look up wiring diagram for each car is prob safest
Yes, most cars use both black wipes for the heater circuit, some use white. It's always best to look up the diagram
@@SuperMarioDiagnostics Thanks a bunch, always great content
Mario great video, I still have a question about the P0300 misfires. I have a 2007 GMC YUKON XL 5.3. I'm having code P0300. When I take off my stabilitrac light comes on and shifts really hard. I have 250k miles. Besides taking it back to a shop should I change all 4 O2 sensors?? Thanks any advice will help about to find a cliff or bridge and drive this SUV off of it.
No, absolutely not. I'd check out live data and see what codes are setting in the ebcm before anything
Thanks for your reply, guess I need to go buy a code reader that gives more info like which cylinder is misfiring. Most of those $60 to $90 readers that Auto Zone or Advance sell only read and allow codes to be erased. Curious which ones they sell allow you to read history or live data. It will come in handy on my kids vehicles. Any advice thanks again
They won't be cheaper. You're looking for an advanced scanner. That's easily in the hundreds
@Angel Puente I sure did,
After spend extra money and a bunch of hours online. A lot of comments said to check to see if the plugs are loose and for a bad coil wire going to the plugs. Well it was both on my SUV, I had the problem with the #1 plug. I change the plug and wire and it's fine now. Good luck hope it helps.
@Angel Puente You should be able to tell if one of them are loose by touching it. When plugs are in correctly they are thight. If it move at all then that's not good at all. And if you do find one loose change it don't just tighten it back down it most likely fouled out.
should have pulled the brake booster hose to get the full rich o2 sensor to try and move. if it didnt which it wouldnt have. just unplug the o2 sensor look for around 450 mv on scanner
Right but how would that address the heater circuits that I had codes for?
I change the o2 sensor at first time and no lost time checking and checking
What???
O2 sensors fixed Yukon p0300 🤔
This issue causses the engine to go rough idle?
Yes but also stayed running terribly on the road
thank you sir for the reply @@SuperMarioDiagnostics
Anytime
Who else has the diagnostic tool you use? The two shops I have been to have very simple tools that say the code and misfire...nothing else. I feel it will not be properly fixed like you do in this video.
Unfortunately that's a problem with the industry. I can only say that you'll have to seek out the right shop. Are they certified? Ask to meet the technicians, see if they attend training... Etc
Mario, you missed Pine Hollow Auto Diagnostics !!…you think Perkins is smart…Ivan has a Mechanical Engineering and Electrical Engineering degree from Cornell (Ivy League) and a PhD in Materials Science from Penn State…now THAT’S smart !!
👍👍👍👍
Chingao acabo de ponerle cabesas nuevas ,lifters, afm oil pressure sensor, porque un lifters collapsed, y ahora tengo p0300 y corre mal :(
What scanner are you using
Autel maxisys 908
What software are you using?
All data
I know this is old but if you are still on this channel let me know I'll for sure subscribe to your channel I've been chasing po300 for to long so I'm going to check the o2 sensors and get bk on this channel to confirm the issue great video brother keep up the good work young man BON TEMPS
Yep still here LOL
Was it your o2s?
I don't know but I've changed all plugs & wires along with all coils new carb knock sensors & harness cleaned intake throughout the whole intake let it dried 3 days I've also got better intake manifold gaskets and never bothered the o2s still ran good except rough idling I've tested for vacuum leaks and none found even the intake wasn't leaking at all that's when it started to mind boggling me so I just drove it around like a little over 100 miles and it started to run smooth again I've checked the system out wit a ob2 tester to see if anymore codes popped up and none showed up it even said the evap is working properly again thank God because that was the next project to tackle but the codes all cleared up and still my daily driver at going on nearly 250000 miles on her yes indeed I've gotten a decent built 2004 4.8 engine
I got that po300 code the other day and then star smelling a rotten egg smell
15:15 man common sense is all you need brother he said that right cause people be overtightened stuff for no reason
Where are you located. Please help me with my truck
Miami FL
So I have code PO 200 and my truck started slipping on gear 3 and overdrive. I can't go over 55. And can't go up hills. What can I do to get back home to Florida? Also hope everything is ok there. A Building collapsed this morning in Miami. So sad
Where r u located bro????
Miami FL