Explorer Sport Trac

Rough Idle and Stalling on Ford Explorer Sport Trac

Problem Description and Possible Solution

The Ford Explorer Sport Trac is known for a rough idle, engine stalling, loss of power, and misfires, accompanied by the check engine light.

The intake manifold O-ring gaskets commonly leak, which creates a large vacuum leak. This vacuum leak causes unmetered air to enter the engine, and the fuel system becomes insufficient to compensate for the large amount of air reaching the engine. 

Replacing the intake manifold gaskets corrects this concern.

Problem Data
RepairPal Verified
Average mileage: 91,491 (58,000–165,000)
Engine affected: 4.0L V6
9 model years affected: 2001, 2002, 2003, 2004, more2005, 2007, 2008, 2009, 2010
17 people reported this problem
Viewing 1 - 4 of 4 comments
check engine light on, lean mixture banks 1 an 2. Found leaking hose for the PCV system at top front of engine,near upper raditor hose connection. It is a 90 degree angled 1/2 inch hose 3 x3 inches long. Rubber deteriorated from age. Found 3 more at salvage yard with similar problem. This is on a 4.0 v6 engine, Ford Eplorer, Sport trac, and Ranger that use this motor.