Hi everyone
I have had a misfire at high boost for about 6 months. Car runs fine off boost and perfect at 1.5 bar. Turn it up to 1.7 bar and it misfires on full throttle from about 5k upwards.
So far i have replaced spark plugs, coil packs, and the whole coil pack loom, all with brand new parts. No real change apart from it was misfiring at 1.5 bar as well before the coil packs were replaced.
It started shortly after I had my engine dressed but I think we have addressed everything that could have caused it from that now. The only thing we haven’t touched is the adjustable cam gears I had fitted fitted at the same time. Darren @ magnum performance says this is unlikely to be the culprit and they were only for looks anyway so no adjustments to timing have been made.
Any ideas?