94 3.3 looses spark when unit heats up

[onthebrinc]

ok,

94 grand am looing spark after engine/unit heats up.
Allready trouble shot out, ecm, ignition coil ,ignition module, ignition relay.

This unit will start everytime run untill a certain temp hits then you here it loose sparlk and die shortly thereafter.

Any possible areas to try and trouibleshoot.

Thanks

[3100]

sounds like ICM they tend to create problems when they heat up.

are you loosing spark on all cylinders at once or just on one of the coils?

also how did you trouble shoot ecm, icm and coils?

[GTP Dad]

Does the car restart after it stalls and you try to restart? If so you may have an issue with the crank position sensor. If not I would lean toward the ignition module having problems even though you have already done some trouble shooting.

[xeroinfinity]

If the ICM tests good when hot, I would agree with GTP Dad and test the crank sensor.