I just changed the fuel pump walbro 340, hotwire kit, car is totally stock
as soon as car starts making power it bucks and detonates .I dont get any error codes .
What chip are you running? Are those changes the only you made? Was it doing that before? At what level of boost is this happening? I'd suggest if you have a street chip in there that you find a fuel pressure gauge long enough that you can tape to the windshield and verify your getting 1 psi of fuel pressure for every psi of boost if your not then somethings wrong with the fuel delivery.
