the reason I think it is t/c is because the t/c light would come off and on all by itself at times now it doesn't, and the pse */c that is who i bought the */c from, the rep and i went over all possible causes ie all vaccum lines also he got me to disable the boost waste gate and there was no change in the timing. at idle in drive the timing is 32 dg and drops back to 6 dg at w/o/t i used a good $4,000 obd 2 monitor from my mechanic, but i did put the boost gate back in operation, boost is between 6 &7 psi, orginal pulley, new */c belt, new tune up, irredium plugs, dang them things cost, new wires new fuel pump it is the correct one for the */c cars also new fuel filter new k&n air cleaner boy i can hear that supercharger whine now and it sounds great :P :P . willwren what is t/m also what does it involve . bill boost i can't find any exhaust leaks and i don't think there is any knocks or rattleing is there any way i can disable the t/c :?: and my exhaust doesn't glow,and i am seeing timing decrease when i use throttle. ever since the t/c lights have quit acting up it doesn't have the preformance it used to have. So she has me scratching. good fuel mileage 28 on highway 22 around town, also 93 octane only goes into this car.