Car:
89 R32 GTR
Problem:
Misfire at idle and when i try to hold it at a certain amount of revs (e.g) 1500, 2000, 2700, etc etc., it idles at 1100-1200 rpm, and if i rev it to about 3000rpm and let my foot of it tries to stall on me. (1 out of every 3 times)
it revs up fine and boosts ok. but wont sit at any certain amount of revs.
tried:
coilpacks
plugs
cleaned/checked AFM
Replace coilpack wiring harness.
replaced all intercooler clamps etc.
any help would be great.