Dodge Repair Questions? Ask a Mechanic for Answers ASAP
Good afternoon and welcome to JustAnswer!!My name is ***** ***** I have worked for a Chrysler-Dodge-Jeep dealership for 19 years and I will do my best to help.
What is the compression for #6 cylinder? Can you feel it misfiring? Have you swapped coils?
And you performed the compression test by removing the ASD relay and cranking it over a few times? What do you mean by able to hold it? If your talking about the compression gauge then it has a schrader valve which will hold the pressure as there is no way for the cylinder to keep constant compression. Also if you can erase the code with a scantool will it come back if you sit and rev the engine, how about if you power brake it?
When you erase the codes with a scantool they are gone for good, when you start it up and the computer see's the misfire again it will set the code again as an active code meaning it's misfiring right now. #6 cylinder is the 3rd one back on the passenger side, and if the compression is good and the same as the other cylinders then your loosing spark or fuel, and since you have swapped coils have you swapped injectors? If you erase the codes and let it idle can you feel it misfire and will it set the code before you rev it up?
If it won't misfire at idle and the check engine light is off then will it misfire as soon as you press the accelerator? The compression for #6 was 140-150, what was cylinder #4 and #8 compression readings? We are seeing quite a few lifter issues which will cause this.. Can you remove the valvecover and remove the ASD relay and crank the engine over and tell me if the rocker arms on cylinder #6 move just as much as the cylinders beside it?
What did you find?