Question about 1991 Chevrolet C1500
Back firing is caused from ignition timing being off. This means that there is a spark igniting fuel when either an exhaust or intake valve is open. Check both your timing chain and also remove your distributor and check to make sure the helical gear is not excessively worn and that the pin holding the gear in place is not stripped. Also check your distributor cap,rotor, and wires for wear as this could also cause you problems.
Posted on May 26, 2010
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Posted on Jan 02, 2017
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