My car is on an AEM standalone, with 272 hks cams and evo 9 turbo. I just fixed a boost leak and put new bpr7es spark plugs in it. Now it is misfiring or breaking up at about 6000 rpms I pulled the plugs to look for detonation plugs look great no specals or nething. I pulled timing down to 11deg and even 9deg. Boost is also around 21 lbs and car is not on a maf. Any ideas. I was thinking coil going bad, loose grounds (tighten all of them)

Also I was wondering what you think about my cam situation Its HKS 272IN/272EX ex -4 and in -1. Always told the evos run great at 0 and 0 with HKS cam gears

 

any ideas, ive been searching this forum for a while.

 

do you have the plugs gapped to .027? had this prob b4 and the gap was off

 

Yes they are gapped .027 to .028 right in there. Thinking its a weak coil or plug wires, trying to find a ohm diag. or something to test coils.

 

nobody ran into this problem, trying to find how to test the coils before i order the ones from spoolinup.com. Do you guys hear good things about this setup. thanks

 

try and low the gap to .24 see if it does anything, i have hks 272's and went from -4 -1 to -3 -3 and love it.

 

My car was breaking up at higher RPMs before I parked it for the winter. I had new plugs put in and it didn't solve the issue. I noticed my cone filter was somewhat dirty. I washed it out and put it back on. So far it has been running top notch with no break ups at higher RPMs. In my case, my car was probably choking because of the dirty air filter.

 

lower the gap.... i had the same problem...