Replaced EGR, checked for vacuum leaks.
replaced plug. Problem still there. Like clockwork, same process, same result. When car is warm, check engine light comes on upon deceleration from 45 mph. Appears to be a dead cylinder at idle #3.
pull plug wire, plenty of spark. No change in rough idle when plug wire is removed.
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Saturday, April 3rd, 2010 AT 9:04 PM