The upper intake manifold gasket may fail, causing an engine vacuum leak and a high idle condition. A damaged intake gasket should be replaced.
Car Problem Reports
Ford Bronco Upper Intake Manifold Gasket May Break and Get Drawn Into Engine
Ford Bronco Problem
3 Reports
Model Years Affected: 1990, 1991
Engines Affected: 5.0L V8, 5.8L V8
Verified
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exgasdriver, 1990 Ford Bronco, 5.0L V8, 95,000 mi
Rookie89 bronco idling at between 1800-2000 rpms, upper intake manifold had 2" piece of gasket missing. Replaced gasket and now at first start up idles at between 1800-2000 till warm then idles at 600-700.
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