Running a Jspec Supra BPU with UK Turbos (if it makes a difference). Also recently noticed the first cat is still in place (the one right at the turbos).
Apart from that, running:
Blitz Nur Spec
mid cat removed
walbro pump
FCD
Greddy Profec B Spec II
I had a missfire issue on high boost 1.15bar so I changed the plugs to some NGK copper plugs gapped to 0.7mm. This didn't resolve the missfire issue.
I then replaced all the coilpack connectors. All good... it seemed to sort the problem out.
The plugs were changed about 350miles ago, clips 300miles ago.
The missfire really only happens on high boost at full WOT, about 5 to 6K rpm. It feels like a VERY rapid hesitation as if it's struggling to accelerate.
The car seems fine on low boost 0.8bar. Only noticed it hesitate once.
So... what now? Surely the plugs can't be duff as they aren't old. The clips have been changed already.
Should I go with the more xpensive irridium plugs? People on here said the plugs I went for should have been fine etc.
The point I'm getting to is that I don't want to spend shedloads on new coilpacks if they're not needed.
Also, is there anyway to test the coilpacks as for all I know if this is the problem, it could only be one that's duff?
How long do coilpacks generally last for?
thanks