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Old 01-26-2010, 11:51 AM   #10
Citizen Mick
Member#: 27646
Join Date: Oct 2002
Chapter/Region: NWIC
Location: Portland, Oregon
2003 Sleeved 2.5
Oil Dry Sump Goodness


Originally Posted by mindchatter View Post
Bump for some more knowledge being laid down. I've got an '04 STi that has always run flawlessly - got tuned for E85 approx 5,000 miles ago and started misfiring in all cylinders about 2,000 miles back.

I've replaced plugs (which looked brand new w/10k on 'em) and did fuel filter today. Misfired within 30 miles. I'm cleaning the MAF tomorrow and then am looking at injectors as the culprit.

I did a compression check 10,000 miles ago and came in at 130 in all 4 cylinders. Plugs when pulled showed no signs of det and I'm tuned conservatively. The fuel is doing something, I just can't figure out what.
If I had to guess then I would guess that you cracked one of the plugs when you changed them. It's a common issue if the plugs are over torqued when installed. What did you TQ the new plugs to when you replaced them?
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