Sup guys,

I'm having a slight issues with my z, its not really a big problem but i want to fix it before it gets worst. When i'm on idle , i feel a slight hiccup every like 2-6 seconds where the rpms drop slightly , also when i put the car under load i feel like it stutters a bit(kind of when nitrous kicks in, but not as strong) Could this be a bad plug?

EDIT: only mod is 5/16th spacer and -2 degrees retarded.

 

It's just getting groggy when the nitrous kicks in. It affects me the same way.

 

The car is no longer on nitrous, it only has a spacer and retarded timings.

 

maybe small vacuum leak

 

I always had a slight misfire at idle when I was stock/untuned. I wouldn't worry about that. Try returning your timing to stock and see if it helps.

 

I get a funny sounding blip every 2-3 sec at idle, but my rpms don't drop. but I'm also APS tt'd...I don't worry about it.