I have a Nx kit , when I spray it have a constant miss, almost like hitting teh rev limiter, imstill running stock gap oon some old autolite plugs , is this teh problem? anyhelp

 

It very well could be. Why not replace them? That way you can atleast rule them out if it dosn't solve the problem.

 

I agree with harris.Put some NGK TR6s in.The problem will 99.9 for sure be fixed.
Dave

 

Yup. I also agree. I had the problem too... the N20 was blowing the spark out. Easy fix

 

I used to have the same problem here also. I'm running TR6s at .035" gap and its like new.

 

when i had my 94 z28, i changed the plugs and wires. went away for about a month. ended up putting a mallory hyfire IV ignition box on. solved the problem. the stock ignition coil just wasn't enough to handle the n2o.

 

Bring the gap down to 0.035, as opposed to the stock gap you are currently running.