my car has been stumbling/hesitating taking off from a stop for awile now and i cant figure out what it is. so far i have replaced O2 sensors, icm,egr, spaced the icm from the head, new plugs, wires,coil, cleaned tb and iac.

anyone got any ideas of what might be the problem. getting fed up with this car

 

Year, miles? Tested Fuel pressure? Also, tested the opti?

I had the same problem, My fuel pump was going out.

 

its a 94 trans am with 110k. i pulled the plugs and they smell like gas. so its more than likely an ignition problem right? havent checked fp yet havent gotten around to it, will be the next thing i check.