Quote:
Originally Posted by ianc
Hey Folks,
Just finished this up without any real issues, not a terribly difficult job. Unfortunately I still seem to get a bit of rough idle and some small pops after a cold start, although it's not throwing any codes...
One thing I did notice which I didn't read any other reports of here however, was oil down on the plug holes. At first, when I only found it on cylinder 2 and 3 (not sure of the firing order, but just counting straight back with #1 at the front), I wondered if it could just be spillage from the oil filer cap. There was some oil around the plug cavities, but not nearly as much as in the cavities themselves. I did find some in #6 though, which is nowhere near the fill cap, which got me started thinking about the failure mode of the coil packs themselves. Old conventional Bosch coils were filled with oil, for cooling I guess. Every once in awhile you'd find one leaking oil down onto the coil wire and causing problems. Could the coil packs be oil filled as well, and leaking down onto the plugs, causing misfire issues?
BTW, the Burger Motorsports socket worked great and was reasonably priced.
As usual, thanks for the great post Dack, you made it easy!
ianc
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Hey Ian,
Well... if you have oil down inside the spark plug holes - your valve cover o-rings are leaking. In some cases the plastic valve cover cracks. When you replace your valve cover gasket take a real close look at your valve cover for cracking.
Your cold start miss could also be carbon buildup or even a bad fuel injector.
good luck,
Dack