Hello I recently bought a '87 305 TPI Trans Am. When i first start the car it runs great, revs awesome and idles smooth. Then when in gear, It will take off sluggish, then will begin to completly die out before it gets a mile down the road and wont rise above 1200rpm without sputtering/backfiring and acting like its trying to shift gears but doesnt have enough power. I know it could be alot of little things causing this, is there anything very common that could cause this? the service engine light is on. ive had a 02 T/A and a 99 WS6 but never delt with this...thanks for your time!
-Roy

 

Iac probably should be replaced also check to see if the tr\hrottle body is clean if coked up black soot will act funny

 

Im pretty sure its the mass airflow sensor