Otown07

Well hell, sounds like you got yourself a genuine mystery. Post it when you figure it out, cause now I'm curious.

Infernokron

Did you try playing around with the gap on your plugs? When I first got my car every time I hit the gas it hiccuped a little bit. When I put the 2.8 on it got quite a bit worse. I started logging with HPT and noticed my car was hitting about 10* of knock retard every time I hit the gas. I tried pulling timing until i was at a about -68* and it still did 10* knock retard (car ran like **** too hehe). I got the NGK's and played around with the gap on them for about a week and now the car is better, it still does the hiccuping but it's not as bad and the knock retard rarely spikes up to 10* anymore.

That's my best bet .

eastcoastz

I'm running the factory plugs. The only knock I see is 4 to 5* at around 5500rpms which quickly gradually drops as the PCM adapts. I need to test the fuel pressure because I might have a fuel pump or regulator which might explain why mu long trem fuel trims are ALWAYS positive and high at that.

chood711

iTrader: (4)

i would agree with the ones who say belt slip. although it has not happened to me it would cause that.