84 300zx problem

[lilskyline240]

I bought my 84 Z turbo like 2 weeks ago and for the last 2 weeks ive been drivin it around my block doin 1st and second gear pulls and boosting 8psi with no problems....then today when i got it registered and took it out to a bigger street and did a 3rd gear pull it got boost just fine then all of a sudden started to stutter like it was either misfiring or didnt have fuel or something.....now it does it in every gear at every rpm...not as bad when not in boost but it still does it....when i try to boost it feels like the car is bout to die when picks itself up and goes, then struggles like a half second later....ive checked for vacccuum leaks the best i can...i have no idea what it could be......in Neutral i can rev it and its fine....no studdering.....only when drivin....could be ignition or fuel filter but idk

someone help me

[lilskyline240]

anyone??

[NISTECH]

sounds like ignition to me. take a look at the inside of the cap. look at your wires real close. Make sure of a couple things. 1 your using NGK plugs. 2 make sure the cap is NOT made in italy.

[lilskyline240]

thanks...ill go check it out