Ram 1500 Hemi 5.7L Cylinder Misfire Returns | Fixed It
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- เผยแพร่เมื่อ 28 ก.ย. 2024
- 👉 Cylinder Misfire codes are very common on any vehicle, but on the Dodge Ram Truck 5.7L Hemi, it could mean something serious. Engine misfire will illuminate the engine light. The Remote Start and the MDS system will also be disabled. This video explains how to diagnose and fix this issue. This is a 4th gen Ram Truck 1500 with 5.7L Hemi Engine, but 2500 and 3500 Ram Trucks and anything thing else with a 5.7L Hemi engine will be the same. Other cylinder misfire codes can be diagnosed the same way Including: P0301: Misfire in cylinder 1
P0302: Misfire in cylinder 2
P0303: Misfire in cylinder 3
P0304: Misfire in cylinder 4
P0305: Misfire in cylinder 5
P0306: Misfire in cylinder 6
P0307: Misfire in cylinder 7
P0308: Misfire in cylinder 8
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These engines are junk, thousands of them have these issues
I'm having this same problem
Can I just buy some fuel injector cleaner and run it through the gas tank
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You can certainly run injector cleaner through the fuel tank. That may help if injectors are dirty & clogged (or a repair shop can professionally clean them). If the injector is failing electronically then cleaning will not help.
Mine is a p0303. Replaced plugs coil Pak and fuel injector. Still there. Anyone wanna buy a good truck? No shavings in oil.
I know I'm a year late but. My 2004 ram 1500 5.7 (millage unknown as they put a new motor in that had 160xxx km on it) I did have a code for a multiple/random cylinder missfire. The truck only missfires in the morning and the code it gone now, I can have it warm up and it'll continue to act up but once it sits from 6am to 930am and the sun comes out it no longer has any missfire and doesn't act up again until the next day. I'm assuming it has to do with the cold air at night and moisture I'm still trying to diagnose any advice would he helpfull. I'm still going to diagnose like you are showing in the video
Youre not that smart to pressure wash the engine lol😊
Cleaning the engine bay has both practical and aesthetic benefits. Pressure washing the engine bay is a common practice among professional detailers and car enthusiasts.
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please do not reproduce..
I’m getting a miss fire on number 3. It has a somewhat new coil pack and 2 new spark plugs. I guess I’ll check the injectors. If that doesn’t work. Then what ?
Hi, thanks for watching/subscribing. If swapping coil, spark plug & injector does not cure the misfire then it may be a mechanical issue with the cam & lifter. You can remove the valve cover to confirm no lift on that cylinder. In some cases PCM can also be the culprit causing an injector/ cylinder to misfire.
@@JSFautoPlus thank you sir. Much appreciated
@@treyt6765 any update? Thanks
@@rahmanr112 I believe it’s a blown head gasket. I haven’t had time to dig into it. But will be doing so soon
It can also be a dropped valve seat in the head. I have seen a few 5.7L hemi but more common issue on the 4.7L. Was the engine overheated?
I had a misfire on #7 on my Jeep 5.7. Was getting the misfire code & the check engine light and it was running a bit rough. Mine turned out to be a vacuum leak. I had to replace my camshaft & lifters about 8 months ago. After that it was running great til about a month ago. Then the timing chain broke and warped some valves. Just repaired all that and got it back together. Thought I was in good shape til the misfire. At least it's just a vacuum leak. Thanks for the great video! 👍
Glad the video is helpful.
Thank you for watching/subscribing..
Where did You have a vacuum leak ?? I have a similar problem but no codes only o live data in Jscan Odb, I see I have a couple missfires only about 2100-2200 rpm. Only In 7 cyl , when I try drive in this rpm then it's counting about 10missfirs on 8 miles trip. No codes, No check engines. I try Injectors swap, coil swap, and pcm change always 7cyl. Best regards.
@@Kabanabak My leak was at the #7 intake. It had a faint hiss, that I wasn't hearing, but my wife and a couple of others heard. I sprayed carb cleaner around #7 and found it. I called it a vacuum leak, but it was sucking air at #7, because my intake gasket had been pinched in two (unbeknown to me).
Sounds like you've checked most everything. If no check engine light is coming on, wonder if there might be something wrong or weak with that cylinder itself. I'm surprised you haven't gotten a check engine light.
I know it's frustrating when you have to do so much through process of elimination. My darn Jeep leaves me stumped and scratching my head often. My wife swears the thing is haunted. Thank God for my scan tool, or I'd be pulling what's left of my hair out.
I’m gonna try this method to search for a leak. My truck randomly misfires most only on cold starts after sitting all night. And stops after I drive it a bit. Some times get 10-30 misfires in a matter of minutes on cylinder 6 watching live data on a Diablo sports trinity 2. But no codes and no check engine light. But I can hear the subtle misses while it’s doing it. It’s an uneven idle until it warms up then it’s fine.