Yes, I have searched...yes there is alot on the topic, I have read it all, I want specific opinions please.
Anyhows I have just put a Profec B onto my 33 and cranked the boost up a bit. Existing mods are:
*Blitz LM FMIC
*Apexi Pod
*XForce 3" Turbo Back
Still running the standard ECU and standard turbo. I have checked and tested the coil packs (still standard), there are in perfect condition, no arcing at all.
Now before putting the Profec B in, I put in some platinum plugs, heat range 6, which are pre gapped to 0.8mm (I am aware you cannot gap platinum plugs). I put them in replacing the plain NGK copper ones I was using and I found the platinum plugs to be better all round, much smoother, performed better in varying temperatures. Just based on this observation I find it hard to believe the missfire is an ignition related problem.
It is still running the standard fuel pump and although I will be replacing the fuel filter again this week, I doubt that would be the problem. Just as soon as the car hits high cam (about 4500rpm) on anything more than 10 pound is just starts spluttering like a little girl and even though it holds boost till redline, it just isnt smooth above 4.5k rpm. I have reason to believe it is running quite rich (just going by the ferocity of backfires while tuning the EBC) so perhaps the annoyingly standard ECU is the culprit.
I have an SAFC (one of the old school turn dial ones) sitting around, don't know if I want to bother with it though...I want to try and fix the missfire by spending as little cash as possible basically - I don't like getting robbed of top end performance. So what you guys would do in this situation?
- Throw money at a new fuel pump
- Throw money at a set of copper plugs and play with the gap (from what I have read 0.8mm is optimal and that is what the performance superior platinums are running...)
- Throw money at installing the dinosaur SAFC
- Rage quit on the car and burn it into a pile of rubble
Cheers all, appreciate responses.