Rough idle due to leading intake manifold gasket on Isuzu Trooper

A rough idle may develop which may or may not cause the Check Engine Light to come on. This issue is commonly caused by a failed intake manifold gasket which will require replacement.

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Average mileage: 137,011 (112,023–162,000)
Engine affected: 3.5L V6
4 model years affected: 1999, 2000, 2001, 2002
6 people reported this problem
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problem details
2002 Isuzu Trooper - 3.5L V6 112,023 mi,
diagnosed when check engine light came on. Should be covered under warranty 10/120 for original owner I'm told. Also told to have dealership do oil consumption test for drain back holes.