thanx for the advice guys, so far ive
1 changed the sparkies to 8mm gapped
2 changed the afm with a mate (the old one was working fine)
3 cleaned the coil packs with wd40 (they were pirtty clean with no signes of cracks and scortch marks
4 tightened all hoses from the intercooler
5 kicked the car
still nothing. i dont know if ud call whats happeneing to my car missfiring :S
in first gear u floor it, all seems fine (if a little laggish as boost never copmes on full :S) then once i hit about 4000-4500 i hear what seems to me as a loss of air (like a blow off valve kinda thing), then the car acts as if it hit the rev limited and falls back. i change to the next gear (3rd usually) this time the air noise is mopre obvious and the car does the same thing at 3000!!!!!.
if i drive the care bellow 3500 this porblem does occur BUT WHO DRIVES A SKYLINE BELLOW 3500!!!!!!
im thinking its some kind of air leak now, or a dead/faulty cpu :S
im stumped guys, were do u think the air leak could be?? has any1 ever experienced this before????
appreciate the help cheers