As soon as the car warms up and the computer goes into closed loop the car starts to back fire, sputter, runs rich and will not hardly stay running. If it dies it will not start untill the motor is cooled back down. I have started by replacing O2 Sensors map sensor, MAF sensor, plugs, wires, coil, and coolant temp sensor. I can't afford to just throw parts at the car and I don't have any way to hook it up to a scanner. Could someone please help me with this!
Chris

 

Kreagens sells the little gm diagnostic scanner. Maybe barrow it (buy/return).

Very little left you haven't mentioned. I guess you tried disconnecting the battery for a few minutes (or at least you've inadvertenly done this during another swap). Last things left are IAC (little sensor on the left side of the throttle body) and the other sensor on the intake elbow. You really do need to scan it to get you looking in the correct area.

Hal

 

That sound like a bad map sensor to anyone else????

 

I swaped the map sensor out too. didn't help at all... anything else ?????