Originally Posted by capitalj4
hey everyone! i have a 2003 wrx with 60,000 miles. hks downpipe, magnaflow catback, cobb up pipe with cell fix. and a cobb ap.
i have been having some problems with middfires. first it was p0302, p0304. then it was p0301,p0302,p0304. now its on all 4 cylinders.
the car missfires at idle and slightly above, then goes away when there is load on the motor. also the car does not missfire when the motor is cold
my plugs are only about 3 months old. and i was woundering if i could bench test my coils some how?
thank-you for any help givin!
This seems to be a fairly common problem. Usually when you go with a larger downpipe its usually without a heat shield. I have a 2004 stage 2 and the under the hood temps fried 3 coils. I just replaced all 4 and everything works great. I got a cusco heat shield and wrapped the downpipe and no problems again so far.