jaysmith2001

I have a misfire or hesitancy if you like, under boost. It's a v2 JDM WRX that I've rebuilt for track days. It was mapped on ESL by racedynamix a few months back but mapper said he couldn't turn boost up any more as it was starting to misfire at a little under 1.2 bar and advised I changed the plugs as he couldn't see any faults. The plugs were brand new NGK! I had done a newage coilpack conversion with 2nd hand packs so replaced them with new surefire coilpacks but it's still doing it. Just fitted a mbc and turned boost down to 1.1bar and it seemed to run a bit better with the hesitancy a little less often but still there. Please help!!

JDM_Stig

iTrader: (3)

What is the gap on the plugs?

jaysmith2001

.65 I set them at. Starting to think a plug maybe faulty?

JDM_Stig

iTrader: (3)

Grab a multimeter and see if the resistance is the same for all your spark plugs.