My 94 Buick Lesabre limited starts cold and runs perfect for about 3min and then engine stops. Will not start until engine has cooled for 30min or more.
Getting fuel but no spark.
Replaced coil packs, ignition module, crank sensor, cam sensor. Cleaned and inspected mass airflow sensor, air filter, vacuum lines, plugs and wiring.
I'm thinking of replacing the throttle position sensor?
My best guess is a sensor is defective and sending a signal to the ECM to stop spark?
Nice car with many miles still to go.
Your help will be appreciated. Thanks