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Originally Posted by gmercoleza
The long and short of it is that I was experiencing an extremely rough idle and stumbling/stalling when accelerating in my 1991 300E with 135K miles. I reduced the spark plug gap on all 6 plugs from about .040 to about .030 and the problem went away. The car idled and ran as smooth as silk for a week! Then just today at lunch it did it again. It only happened 3 or 4 times over the hour or so that I sat in my car eating my lunch. It did that same abrupt misfire which previously only got worse.
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My first thought would be that regapping the plugs did not fix the problem, but the PROCESS of doing that somehow affected the real issue. Analyse what you did - e.g., moved plug cables aside, unplugged/replugged connectors, R&R plugs, etc. You probably disturbed something in a way that temporarily allowed it to perform normally, but now it has shifted again.
Steve
05-25-2005, 09:15 AM
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