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.
Engine Misfire Due to Plugged EGR Orifice on Mercury Monterey
Average mileage: 112,093 (72,000–195,000)
15 people reported this problem
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Viewing 1 - 5 of 5 comments
EGR is plug how would i go about cleaning it and what with
hesitates when accelerating. problem getting worse.
When I am slowing down or stop it shutters and stalls. When I was driving it bucked and jumped a few times.
EGR Valve replaced.
same problem at accelerating, seems like its misfiring