how sensitive is the computer to miss fires?
Thread Starter
TECH Fanatic
Joined: Oct 2003
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how sensitive is the computer to miss fires? very strange cars been running like crap for a few days, i could hear it missing at idle... didnt throw a code for a couple day, but finally did. seems odd, i though obd2 was super sensitive to miss fires.
what else is odd is i cleared the code and now it idles better? it was a missfire in cylinder 4 code.
in the 80-90k range so probably due for some plugs and wires.
what else is odd is i cleared the code and now it idles better? it was a missfire in cylinder 4 code.
in the 80-90k range so probably due for some plugs and wires.
Thread Starter
TECH Fanatic
Joined: Oct 2003
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i got 3 and 4 mixed up when i checked the plugs, 4 was actually pretty bad... very white and lots of buildup on it.
also noticed almost all my plugs were oily on the threads. seemed rather odd, is that from oil getting into the combustion chamber?
also noticed almost all my plugs were oily on the threads. seemed rather odd, is that from oil getting into the combustion chamber?
On The Tree
Joined: Aug 2010
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I had the same issue in my 07 MCSS. I would get a service traction warning though and some other crazy nonsense. I could feel it misfire at idle and sometimes hear it, had it checked out at the dealer, just as baffled. I pulled the plugs and had the build up, replaced the plugs and wires problem solved. I would say do the valve cover gaskets and get the grommets as well. RockAuto has them both from FelPro just have to order separately, easy to do since you are there already. As for the oil on the threads valve cover gaskets maybe, someone could chime in on that with a better answer as mine has a noticeable leak; however, If it was in the chamber it would also burn onto the plug electrodes and leave a noticeable residue.
