Rough Idle When Cold Due to Upper Intake Manifold Gasket Leak on Ford Explorer

TheĀ Check Engine Light will illuminate and the engine will idle roughly when cold. There are updated upper intake manifold gaskets to resolve the problem.

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Average mileage: 129,662 (51,000–205,631)
Engines affected: 4.0L V6, 4.0L V6 SOHC
5 model years affected: 1997, 1998, 1999, 2000, more2001
18 people reported this problem
5 people shared problem details
1998 Ford Explorer- 4.0L V6 SOHC70,000
Replaced intake manifold. Cost about $500. They tried other things first (that didn't work) for another $400.
1999 Ford Explorer- 4.0L V6 SOHC124,000
intake manifold gaskets replaced
1999 Ford Explorer- 4.0L V6 SOHC68,000
engine light on and truck dies or idles rough till warm.
1998 Ford Explorer- 4.0L V6
I could not solve it
1998 Ford Explorer180,000
new intake manifold gaskets
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