Hello all.
I have a 1997 Cavalier, 2.0L 5 speed. It starts fine and runs well until it reaches running temperature, and then it sputters and/or stalls and must cool off before you can get it running good again. The computer is giving a code running lean. Does anyone have any ideas? It's much appreciated.

How many miles?
Throttle body or port injection?Could be the fuel pump.

I have a 1997 Cavalier, 2.0L 5 speed.
That vehicle doesn't exist. '87 had a 2.0L, if it's a '97 it's either a 2.2L or 2.4L.

A bad ignition module can do that. Could also be a vacuum leak, low fuel pressure, bad O2 sensor, or bad MAP sensor.