Dodge Repair Questions? Ask a Mechanic for Answers ASAP
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I see that you have a cylinder #3 misfire, but what have you done to correct it? If nothing then I would swap coils, spark plugs, injectors, until the misfire moves and then replace that component..
Let me know what you find,
I see you wrote this:
did compression test on the left bank, I got 145, 140, 130 (cyl 3), 140
Are you testing the 3rd one back on drivers side as cylinder #3? If so then #3 is the 2nd one back on the drivers head.. Drivers head is 1-3-5-7, pass 2-4-6-8.
And #4 is 2nd from the front on the drivers side, so you have swapped coils-injectors-spark plugs and it still misfires? Is it dead cylinder or intermittent misfire? If you grab a test light is the coil and injector receiving proper ground pulse from the PCM?
I'm sorry I posted #4 is 2nd back on drivers, and I meant to say passenger side.. And is this a dead cylinder?
What is compression of #4 and are you using Champion plugs?
Because I have had Independant shops bring misfires into my dealership and the problem was they used Autolite plugs. Once I installed Champion the misfire went away...
Yes and if it hasn't moved your issue isn't the plugs.. What year model do you have and is it a dead misfire or intermittent? Since it's 130 and the rest are 140 I would perform a leakdown test to see if you have an issue with the rings or valve seats. Which cylinder did you have an issue with valve seats?
If it's not a dead cylinder then yes I would perform a cylinder leakdown test to see why it's lower than the rest..