dollarbillion

i am having trouble with my 1990 350 the car runs fine until it warms up then it cuts off like it ran out of gas and wont restart until it cools off again . I replaced fuel pump and filter what else should I check.i have a HEI dis. changed coil check for spark it is good had moduel checked it is good. does any one know what problenms too look for if computer is bad how to tell, I donot have any trouble codes stored or no check engine light on maybe this is the problem would like to know how before I go out and buy one.


thanks for the help

rick lambert

Quite honestly I don't know if the 90 has an Opti or a HEI distributor, but if it has the HEI I'd have the ignition control module checked. When they're on the way out they typically raise their ugly heads after the engine has warmed up.

jfb

When hot, check for spark, check for fuel pressure, check for fuel pressure holding up with the ign off. Check for pulses at an injector during cranking.

87 rag

This is a common problem.
Ignition module.