exhaust note
 

Aight well i have a 95 gt with going on 106k. The only thing ive done to it is remove the air silencer, add flowmasters and a bassani o/r x pipe. When it starts up it sounds like a lopy drag car but then about 1 minute after running it smooths out and idles normal. Sometimes when i start up the rpms drop really low and want to stall it out. Granted i like the sound for them first few minutes because it sounds really mean but what would cause this. It happens every time i crank it.

Mass air sensor is probably going bad, remove the cable to the sensor and see if it changes, if it does then the sensor is bad. Its a comon issue. Tune-up been done? TFI module replaced? Gas filter, etc?