Thread: 98 contour 2.5l dohc misfire/rough idle
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Old 02-12-2015, 07:36 PM   #12
FUKENEH
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Re: 98 contour 2.5l dohc misfire/rough idle
Had the same issue. First i replaced the upper intake manifold. This did not fix the problem.

The problem was the gaskets around the spark plugs on the valve covers. Got oil on the spark plugs and caused a misfire.
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