Question about 1988 Chevrolet C3500

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Please help I have a 1988 Chevrolet C3500 Ext. Cab Truck with a 5.7L TBI engine and TH400 Transmission. While going down the road engine dies, the injectors are shutting off. Remove breather and wait a few minutes they start working again. Problem continues to occur with out any consistancy. The only thing that shows on flashing check engine light code is a repeated 12. What do you recommend?

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Code 12 is no tachometer or reference signal to computer.means a bad ignition module.replace it.also test coil make sure its not open or bad.

Posted on Jun 14, 2009

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