I bought stage 2 power pack from cobb about two months ago, installed myself, it has ran great but recently the power and not been smooth in higher RPM range 4 to 6k. The other day on my way home from work i went to go around a semi and when i hit about 4k RPM the car started stuttering. No CEL it sounded like the blow off vale,stock, was opening and close really fast it would not hold boost. When i got home hooked up the ap and read codes it sad misfire on 1 and 2 and PFFFF. not sure what to do. i have reset and drove around easy and it will not send a code but when i get on it, mainly, 3rd through 5th it sets codes again. i have to use the ap to see if it sends code CEL never comes on
Well I am sorry to witre a post then come right back on and tell everyone that I'm a DA. had a intercooler hose not tight fixed my problem runs better then ever. now i notice the it hit 19.9 lbs boost is that ok or to high.