My Z recently has been hesitating when it is warming up. I installed a Plenum not too long ago but I dont think there is any leakes in the Manifold. Im running full exhaust and CIA I havent got a tune yet so maybe that could be the problem. It didn't start until just recently though and I have had my Plenum Spacer on for about 3k miles now. Any suggestions?

 

trying getting a pretuned unichip and upgrade your spark plugs. Should be an easy fix

 

What spark plugs would you recommend? How large the gap as well?

 

thanks