guys i have a r32 gtst "limitted mods",just had it on the dyno and all seems ok they tell me, however i get loud POPPING/BACKFIRE noise coming from the exaust.The guys at the dyno place said my air fuel mixtures were spot on?Any ideas it normally makes it when i am off boost and at mid range revs,then sooon as i put the foot on the accelerator it pop/backfires??? :flower: