EGR Orifice in Intake Manifold May Plug With Sludge and Cause Misfire on Mercury Monterey
Problem overview
On higher mileage vehicles, one or more EGR orifice in the intake manifold may plug with sludge. This can cause the engine to misfire when first accelerating because too much exhaust gas is directed into the cylinders where the orifice is not plugged. Cleaning the clogged passages should correct this concern.
20 people reported this problem
6 commentsMercury Monterey vehicles with this problem
Average mileage: 125,357 miles
(72,000 - 258,000)
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