86 caprice won't crank

Asked by Nov 12, 2016 at 03:46 PM

Question type: Maintenance & Repair

I have an 86 caprice with a 4.3 engine TBI I
replaced the fuel pump, fuel injectors, and the brain
box, and it only cranks when I pour gas in the
throttle body....what else could it be?

1 Answer

69,385

It's definitely a fuel problem. Is the fuel pump running? Did you check/replace the fuel pump relay? Do you have a trigger signal at the fuel injectors? Did you transfer the PROM from the original ECM (brain) to the new ECM? Was the check engine or service engine soon light on before it quit? Have you checked the crankshaft position sensor? HTH. -Jim

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