EGR orfice in intake may plug with carbon on Ford F-150

Problem Description and Possible Solution

The EGR orifices in the intake manifold may plug with sludge. If the truck has high mileage, this may cause engine misfire when first accelerating because too much EGR gas is directed into the cylinders of the unplugged orifices. This makes the mixture lean, which causes a gradual stumble that increases in severity until repaired.

Problem Data
RepairPal Verified
Average mileage: 113,699 (25,798–215,000)
Exhaust & Emissions affected: V6
4 model years affected: 1997, 1998, 2002, 2007
7 people reported this problem
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