i just got my car back and it seems to like hesitate, or almost cut out and stuff around 4500 or so. I thought it could just be lack of fuel. It pulls fine in lower rpms just up high starts to stutter. I just had alot of work done and the mods u can see in the signature. Problem is that i have stock injectors. SHOULD new injectors and fuel pressure regulator seem like a solution???

just got my CC306 and bored over .30 and then all internals changed out.

 

ttt

 

scan your car and check the injector duty cycle and see if they are over 100% a decent amount of the time.. that will let you know if the injectors are maxing out. I had a problem though with my car cutting out at higher rpms and it was a failing optispark though.. threw a code also (lo res pulse).