this question is for a 99 silverado 4.3 engine,,,after moisture fouled the distributor cap, i replaced with new cap and rotor,,,now engine backfires on start and idles rough,,what can i check?

Ill Eagle

Asked by Mar 27, 2016 at 05:29 PM about the 1999 Chevrolet Silverado 1500 LS Standard Cab SB

Question type: Maintenance & Repair

moisture fouled out the distributor cap,,so i replaced. now engine backfires on
starting and idles rougher than before,,
what do i check now?

1 Answer


I'd suspect moisture still in the ignition system somewhere, moisture is good for pointing out bad components. Have someone turn it over and listen by the coil for a snapping sound. That would be the spark finding its way to ground.

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