Hey Guys,
Heres the story.
Changed the motor in the r33 and replaced it with a S2 motor, using the s1 coil packs and wiring harness.
Now under load and above 4000rpm it is missing and popping quite a bit. The s1 coil packs which are being used were working perfectly fine before the motor change.
I have changed plugs with new NGK Bcpr6es gapped at 1.1 . Beforehand it was missing at all rev range, now its just missing above 4000rpm.
Boost gauge is showing about 0.4 - 0.5 bar, HOWEVER, the turbo seems to be sounding like it is spooling quite a lot more than before the motor change. (Alot more whistle).
Possible causes is that I have hooked up the vacuum lines wrong? (The s2 motor has some different vac setup). But there is no hunting at idle and its not running rich?
Also, there is a really small vac hose at the rear of the inlet manifold, I cannot find where this once went?? Its about a 3-4mm diameter. Could this be the cause and if so, where does it go lol Im shocking..
I know alot of you will say coilpacks, based on what the search has showed me. But I would like to tackle some other areas first before i go fork out for some splitfires!!
Any help would be muchly appreciated