Major Contributing Member
Join Date: Mar 2011
Location: Vancouver B.C.
Thanked 96 Times in 83 Posts
If you are only getting the misfire code then I usually start with the following checks:
-check spark plugs for damage and gap
-check coil packs ( make sure they are grounding correctly through the plug and not arcing )
-clean O2 sensors
-Clean cam position sensor
Those would be the "easy" fix's - if you still get the code I would look into
-fuel supply ( pressure and cleanlyness )
-exhaust valve ( stuck open ? )
I dont have much experience on these engines but I have done 3 engine swaps/rebuilds on my STi .. needless to say, misfires are a crap shoot to track down.
Last edited by AROD; 12-10-2012 at 07:07 PM.