At high boost I'm having an issue were I am misfiring sporadically. I had this issue ever since I removed the boost restrictor, I replaced the plugs with BKR7E-8 and the issue went away. My car is running pretty rich so I have to change plugs ever couple thousand K's. So I started having my breakup issue again two days ago. I pull the plugs they are black and fouled even while running water/meth setup. I change plugs again to BKR7E-8's however my misfiring hasn't gone away. I checked my coils they seem fine is there anything else it can be? Should I try closing the gap a bit more?
Thanks in advance,