Car Problem Reports

Chevrolet 1500 Pickup Idling Problems Due to Vacuum Leak in Throttle Body Gasket

Chevrolet 1500 Pickup Problem
8 Reports
Me Too

Model Years Affected: 1990, 1991, 1992, 1993, 1994, 1995

Engines Affected: 4.3L V6, 5.0L V8

Average Mileage: 171,000 mi (148,000 mi - 194,000 mi)


The throttle body gasket may develop a vacuum leak which may result in a higher than normal engine idle. Failed gaskets will require replacement.

  • Visitor, , 4.3L V6, 194,000 mi

    engine idles too fast, wasting fuel, and making it unsafe at slow speeds, because i have to have my foot on the brake. carb cleaner sprayed at the base of the throttle body, when idling, is sucked through, causing the enging to bog down for a short time. I suspect a gasket failure.
    This problem has not been fixed yet.

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  • Visitor, , 5.0L V8, 148,000 mi

    higher than normal idle, just started looking for solution.

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