hey guys i am in need of help!!!
my situation is, put an rb20det in to my r31 skyline, started it all ok, once everything was done and ready to drive still all ok and then about a month into it the car starts running really bad. Looked on the forums for the problems i was having and nothing seemed to work. when car is free reving it seems to miss at about 3000RPM and when under load and about to come on boost the car seams like it stops and picks up again. But some times the car runs as if nothings wrong but most of the time runs like crap.
things i have done and checked:
replaced plugs
checked coils and replaced as they looked stuffed. the ones that i put in were from an rb20 but they were spring type and the ones that were on the car were a pin type. would they still work fine??
checked cas and timing all ok.
was just wondering could a stuffed AFM cause this sort of a problem??
any help would be much appriciated.