View Full Version : Misfire solved when swapping coil packs??

11-25-2006, 08:46 PM

My S14a SR20DET has been getting misfire under boost (3500rpm and wot) last month and I couldnt' find the problem.
Last morning I tryed swapping coil packs, I replaced Nš1 cilinder coil by Nš4 coil and viceversa. Suddenly misfire has disappeared,almost complitely.
I still hear detonation at 3500 and above on wot, that was the rev range in which misfire happened.
So, my questions are:
Should I replace all my coil packs? Is my engine getting weak ignition due to weak coils? Could it be faulty ignitor chip?
Can I clean coil packs? how to?

Thank you