could someone help me please i fitted 555 inj chipped ecu bigger intercoolers and few other little bits my knock sensor broke, was getting worried cause read some threads about listen for detonation , what does it sound like running about 12 to 13 psi but when i put my foot down when i come off it sounds like gun shot is that detanation, the chip come from a manual mine is a conversion auto to manual would the differance in cams and turbos be a problem with that chip any help appreciated thank you.

Where did you get the chip and is it setup for the 555 injectors? Pretty sure the backfire is fuel igniting in your exuast

i bought another car for manual conv it came with it all on it and a set of technic turbos