Any ideal ?? 97 silverado 4.3 vortec shut off after a loud backfire while driving . It cranks over but will not start now. I checked and it has spark .

Asked by May 11, 2015 at 10:09 AM

Question type: Maintenance & Repair

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Run a compression test. The backfire suggests that it jumped timing. If you have low or no compression on all cylinders, it's jumped timing. HTH. -Jim

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