2011 Ram 1500 5.7 hemi cylinder 5 misfire code

Asked by Beto_1922 Oct 22, 2018 at 06:51 PM about the 2011 RAM 1500 SLT Quad Cab 4WD

Question type: Maintenance & Repair

I'm getting a cylinder 5 misfire code I've changed
the spark plugs and coil packs but code is still
there starts up fine runs up to 50mph and starts
shaking get it home and when I put it in park it
seems like it wants to turn off but it doesn't.. HELP
!!!!

2 Answers

157,325

Check for a broken valve spring or rocker arm on the number 5 cylinder. Also the #5 fuel injector could be bad.

4 people found this helpful.
40

On a mis fire, if you've changed the coil and plugs, and you still have it, it's not good. Do a compression check. I suspect low compression on the coded cylinder. What happens is the valve seats and guides get worn, or don't seat right due carbon causing low compression. When that cylinder fires, it doesn't fire as hard and as fast. A milli second slower. The computer picks it up and you'll get that code. In the old days the guides were made of bronze, now they are aluminum.

3 people found this helpful.

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