what can cuase detonation.. the tune is perfect for 3 years... new map sensor, whole igniton system is good, checked wires, msd box, blaster coil, injectors pulse perfect, resitor replaced... new fuel pump 255 hp pump, car runs rich at idle and detonates 4th gear 7000 rpm 5th 5500... thorws code 43 once in a while... nothing changed at all on the setup... runs lean crusing on highway... tps calibration is good... by passed msdbox and blaster coil used stock igniton and the same problem...fuel press builds perfect until detonation... ANY IDEAS... if in orlando area 500$ if you can fix this simple problem since no shops have any clue whats going on...