my 1993 trans am had a delteq system installed when i bought the car a few months ago and it just started running rough. So I took the delteq off and hooked the MSD pro billet opti (already on car) and put a stock coil on it. The car runs great now until about 2000rpms. After about 2000 rpms, it feels like the car has a minor power loss and the stock rpm gauge will start working backwards. the rpm gauge works fine until 2000 rpms, then as the rpms increase the gauge will fall. the car drives fine even with the minor power loss above 2000 rpms. also if the car is in idle you can rev the engine and it sounds different above 2000 rpms but it is not a miss.

 

Check for codes and see if you are getting DTC 36.

 

ok i got one of the scanners where you have to count the flashes. But will it work without any SES lights on?

 

Yes. There are codes that don't turn on the SES light, including the ones for the Opti's cam position sensor.

 

the only dtc i got was 12, but it might be becauce i have only drove the car a couple of times since it started acting up.

 

As long as you haven't pulled the power to the PCM (PCM BAT fuse or one of the cables off the battery) any codes should be stored. 12 as you are probably aware indicates you have successfully entered diagnostic mode.