I had the same problem on Cyl. 3 and dryed it out, put in new spark plug, coil, several times! No luck. Finally, because the start of my problems began with a change to the A/C system and required me to separate large electrical connectors near the evaporator, I thought I might have a connector problem. Careful examination of the male pins of that connector (upper one) I found 3 pins had been pushed out of place and were not contacting the females. Fixed that, and finally! Everything worked again, the misfire stopped, my indicator light on the overdrive worked, my a/c began to run and continue running. Moral, do not overlook the connectors!
There is a step-by-step video on RUclips which illustrates how to do the repair. It really isn't that big of a deal. Make some coffee, turn on the radio, forget about the clock and just do the job. You can tell your buddies what a Great mechanic you are...
Appreciate the info my friend that's exactly what I had to do to my Ford replace the intake it all comes in one piece while I was in there doing that I went ahead and changed the plugs coil packs water pump and radiator and fuel injector
I wish ignition systems were still old school distributor, points, and rotor button. They were so easy to work on. You had to tune them up a lot more often but they were easy to fix and easy to diagnose. Dang! Today cars have computers and so many sensors of them it takes forever to figure out what the problem is. Unless of course you have enough extra money to just bring it to a mechanic shop. I don't so I have to fix my own cars most of the time. My next vehicle is going to be an old 70s model. LOL
Unplug the EGR vacuum tube and plug the end up with a screw. I bet that stop it. My 2002 ford f150 with the same 5.4 did the exact same thing. I put a new intake on it and it did nothing. It was the EGR valve bad. A friend told me how to check it. It is right on top of the motor in the back. The hose will be small about the size of a pencil lead. Unplug it and put a screw in the end. if that stops it then replace the EGR valve. This is not for the guy who made the video but for all of you out there that doesn't have a bad intake. Try it and I bet it fixes the misfire.
You have to replace the maniful and make sure change the spark plugs if you want to change the coils to do it when you change the maniful because is more easy I did my self for the same problem maniful leak ONE RECOMMENDATION BUY THE PARTS FROM AMAZON BECAUSE THE PRICE IS MORE CHEAP
Could you make a video on this truck about the vacuum hoes and the pipes all in that area. The farthest closest to the steering wheel keeps shooting out. I drove it disconnected and it got me home before it shut off. Connected it sounds like it's struggling and drowning. What are your thoughts on that (to the public and to the man posting this video) I'm working on my truck myself, I already replaced the throttle and coils. I'm here to learn, I don't want to send my truck off to someone else. Thank you in advance!
Wow I just wanted to say that I have a Ford Expedition 2003 with just starting to have a lot of misfired on it and I did change coils and I was thinking about doing spark plugs but I have that leaked also on my vehicle and I believe that is the same problem that you have because the symptoms you mention exactly what mine are going on my thank you for making this video it help start making plans soon to have the intake replaced and a bunch of other items that need to be done ✅ thanks again
Pull the misfiring coils and you will find water in there......put some bars leaks copper in the radiator.....dry out the water....lube the end of the coil with dielectric grease....it will run fine...not a permanent fix of course but will buy you some time.....main fix is replacing the intake manifold as you say...
Just replaced intake on 2000 5 4l and after replacement I had misfires on cylinder 3 4 & 8. After changing them it's not throwing no codes for misfire but getting code 0171 running lean on bank 1. How can I fix this? No codes for misfire but code for running lean on bank 1. Could it be my plugs? Would it throw a code for bad plugs?. Couple cylinders are wet from old intake leaking but before I changed my intake it ran perfect even with antifreeze filled up in the plug well so I don't think that's what it is. Any help is appreciated
I would clear it and see if it comes back. If you've done that..is there a possibility you could have gotten something in or on the end of the injectors? Have you tested the oxygen sensor? Clean the batter terminals. You could have been running lean before but it wouldn't have thrown a code with the miss fire
@@oldradio16 It run perfectly before changing intake, after replacing it it's misfiring. I'm thinking I might have gotten a little antifreeze in it and the plug is misfiring. When I first started it this morning it run perfect and once I put it in gear it started missing...ill try what I said and check for leaks on vacuum lines and map sensor I'll clean it too. Maybe I'll get it figured out before I take it to someone else who is better than I am
@denton Dunn mine was doing that. It can be your pcv valve,egr or oxygen sensor. I replaced all of it. The last thing I replaced was my coils and it solved the problem. Hope it helps. What I want to know is why my truck sounds like I got a chicken squealing when I start it. Don't know if it's my flex plate.
An when I was taking out plug #1 it was loose an the ground electrode was burnt off ! I was told by another mechanic to do a compression test but he saw the picture of the Plug an said could be a burnt exhaust valve 🤔🤔 I need help on this situation
@@oldradio16 it gotta hard start but will crank up but misfires bad and when I put it in gear to move it no power I don't hear no knocking or tapping ... I do see on driver side valve cover there will be white looking smoke im just tryna find out what is really going on
@@jollyjacobs5445 have you pulled the codes to confirm its a misfire on #1? Other codes? A single misfire shouldn't cause no power, this truck is still completely drivable with one plug completely disconnected..not fun or good for it but Definitely not no power
@@jollyjacobs5445 don't torque the plugs.. just hand tight enough to crush the sleeve on the plug and recheck after warming up the engine a couple times.... Torquing strips them out
+oldradio16 Thank you for responding back. I'm trying to Gage or anticipate when I might have this problem. I have a 2002 with 97000 and I know this is a problem with the 5.4 Triton. I'm just preparing it advance.
I had the same problem on Cyl. 3 and dryed it out, put in new spark plug, coil, several times! No luck. Finally, because the start of my problems began with a change to the A/C system and required me to separate large electrical connectors near the evaporator, I thought I might have a connector problem. Careful examination of the male pins of that connector (upper one) I found 3 pins had been pushed out of place and were not contacting the females. Fixed that, and finally! Everything worked again, the misfire stopped, my indicator light on the overdrive worked, my a/c began to run and continue running. Moral, do not overlook the connectors!
There is a step-by-step video on RUclips which illustrates how to do the repair. It really isn't that big of a deal. Make some coffee, turn on the radio, forget about the clock and just do the job. You can tell your buddies what a Great mechanic you are...
Appreciate the info my friend that's exactly what I had to do to my Ford replace the intake it all comes in one piece while I was in there doing that I went ahead and changed the plugs coil packs water pump and radiator and fuel injector
I wish ignition systems were still old school distributor, points, and rotor button. They were so easy to work on. You had to tune them up a lot more often but they were easy to fix and easy to diagnose. Dang! Today cars have computers and so many sensors of them it takes forever to figure out what the problem is. Unless of course you have enough extra money to just bring it to a mechanic shop. I don't so I have to fix my own cars most of the time. My next vehicle is going to be an old 70s model. LOL
Unplug the EGR vacuum tube and plug the end up with a screw. I bet that stop it. My 2002 ford f150 with the same 5.4 did the exact same thing. I put a new intake on it and it did nothing. It was the EGR valve bad. A friend told me how to check it. It is right on top of the motor in the back. The hose will be small about the size of a pencil lead. Unplug it and put a screw in the end. if that stops it then replace the EGR valve. This is not for the guy who made the video but for all of you out there that doesn't have a bad intake. Try it and I bet it fixes the misfire.
Thanks for the bad news. That's exactly what's wrong with mine
Yes i just changed my intake manifold due to a leaking crossover tube was causing a misfire,changed manifold plugs and coil packs
You have to replace the maniful and make sure change the spark plugs if you want to change the coils to do it when you change the maniful because is more easy I did my self for the same problem maniful leak ONE RECOMMENDATION BUY THE PARTS FROM AMAZON BECAUSE THE PRICE IS MORE CHEAP
I have same leak it does have a gasket for cross over pipe. Im gonna tackle mine soon think i have a video on my page
#3 misfire..changed coil....that was over 40k miles ago...running great since
What year and what was your code
Could you make a video on this truck about the vacuum hoes and the pipes all in that area. The farthest closest to the steering wheel keeps shooting out. I drove it disconnected and it got me home before it shut off. Connected it sounds like it's struggling and drowning. What are your thoughts on that (to the public and to the man posting this video) I'm working on my truck myself, I already replaced the throttle and coils. I'm here to learn, I don't want to send my truck off to someone else. Thank you in advance!
I have the exact same problem on mine, except I only get misfires on #1 and #2 cylinders.
Wow I just wanted to say that I have a Ford Expedition 2003 with just starting to have a lot of misfired on it and I did change coils and I was thinking about doing spark plugs but I have that leaked also on my vehicle and I believe that is the same problem that you have because the symptoms you mention exactly what mine are going on my thank you for making this video it help start making plans soon to have the intake replaced and a bunch of other items that need to be done ✅ thanks again
Pull the misfiring coils and you will find water in there......put some bars leaks copper in the radiator.....dry out the water....lube the end of the coil with dielectric grease....it will run fine...not a permanent fix of course but will buy you some time.....main fix is replacing the intake manifold as you say...
Very common problem....
Just one coil misfire will make these run like garbage....
What will cause my 2002 Ford Harley Davidson truck to misfire an when I put it in gear no power to move it! 5.4 2v motor supercharged
I have a miss from about 1400 to 1800 rpms no codes can't figure it out
Same with my 97 5.4, here is a video that might help. ruclips.net/video/2mc-c8ZuAb4/видео.html
My 02 sounds like it’s straight piped all of a sudden any thought? It’s coming from the engine cab not the exhaust
Manifold leak?
Mine did that turned out to be a bad exhaust flange.
@@ladybird1782 someone tried too take my catalatyc converter but also had a air pressure sensor I had to replace
Mine was the , heater core was leaking on the cop
I have a ford f150 2004 5.4 all the cylinders are misfiring already change all the coils
Rene Castro change the plugs
Just replaced intake on 2000 5 4l and after replacement I had misfires on cylinder 3 4 & 8. After changing them it's not throwing no codes for misfire but getting code 0171 running lean on bank 1. How can I fix this? No codes for misfire but code for running lean on bank 1. Could it be my plugs? Would it throw a code for bad plugs?. Couple cylinders are wet from old intake leaking but before I changed my intake it ran perfect even with antifreeze filled up in the plug well so I don't think that's what it is. Any help is appreciated
I would clear it and see if it comes back. If you've done that..is there a possibility you could have gotten something in or on the end of the injectors? Have you tested the oxygen sensor? Clean the batter terminals. You could have been running lean before but it wouldn't have thrown a code with the miss fire
@@oldradio16
It run perfectly before changing intake, after replacing it it's misfiring. I'm thinking I might have gotten a little antifreeze in it and the plug is misfiring. When I first started it this morning it run perfect and once I put it in gear it started missing...ill try what I said and check for leaks on vacuum lines and map sensor I'll clean it too. Maybe I'll get it figured out before I take it to someone else who is better than I am
@denton Dunn mine was doing that. It can be your pcv valve,egr or oxygen sensor. I replaced all of it. The last thing I replaced was my coils and it solved the problem. Hope it helps. What I want to know is why my truck sounds like I got a chicken squealing when I start it. Don't know if it's my flex plate.
@@lilygomez82
It was a vaccum leak behind the throttle body believe it or not where I changed intake
@@dentondunn4346 where is this vacuum line?
An when I was taking out plug #1 it was loose an the ground electrode was burnt off ! I was told by another mechanic to do a compression test but he saw the picture of the Plug an said could be a burnt exhaust valve 🤔🤔 I need help on this situation
If the plug was loose you may have stripped threads in the head thats another common issue with these trucks
@@oldradio16 I done put new plug an coil torque 25lb
@@oldradio16 it gotta hard start but will crank up but misfires bad and when I put it in gear to move it no power I don't hear no knocking or tapping ... I do see on driver side valve cover there will be white looking smoke im just tryna find out what is really going on
@@jollyjacobs5445 have you pulled the codes to confirm its a misfire on #1? Other codes?
A single misfire shouldn't cause no power, this truck is still completely drivable with one plug completely disconnected..not fun or good for it but Definitely not no power
@@jollyjacobs5445 don't torque the plugs.. just hand tight enough to crush the sleeve on the plug and recheck after warming up the engine a couple times.... Torquing strips them out
Hello, what was your mileage on the truck when this problem occured?
This is at about 234,000.
However this was an issues when the truck was bought
+oldradio16 Thank you for responding back. I'm trying to Gage or anticipate when I might have this problem. I have a 2002 with 97000 and I know this is a problem with the 5.4 Triton. I'm just preparing it advance.