I have an 89 cutlas ciera wagon 2.8 engine. The vehicle will start then stall after the engine warmsup and is aloud to cool back to about 120degrees F.
Ignition module, distributor pickup are the 2 most common problems, it could be a fuel pump overheating also, make sure you have at the minimum a 1/4 tank of fuel. A quick check would be to install a fuel pressure gauge on the fuel shrader, run it until failure, if you have good fuel pressure at time of failure then the pump is good, then check to see if you have spark from the ignition coil, if no spark then check for battery voltage on the positive wire at the ignition coil, then check for a coil trigger signal at the ignition coil negative wire, if no signal then replace the ignition module and pickup coil, it might be cheaper to replace the entire distributor as compared to replacing the individual components.
These engines had a problem with fuel injectors shorting-out when hot. When the injectors cool down, the electrical resistance will increase again, and the engine computer will re-enable the injector driver. It's a safety built into the computer. Have a mechanic check the injectors with an Ohm Meter. They should all be about the same. If any show a lower resistance, replace the injector(s). If I remember correctly, a good resistance is about 11.9 to over 12 ohms.
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