I have a 1988 cougar that stalls or won't start when the engine is hot. on 1990 Mercury Cougar

I know the Distributor mounted TFI causes this, But the TFI is mounted on the radiator on the 1988. What can cause this problem?

Asked by for the 1990 Mercury Cougar
Loosing spark when it won't crank??
no..i don't have spark to the coil..