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Old 10-15-2001, 04:58 PM
vrsmith vrsmith is offline
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Join Date: Feb 2001
Location: BC, Canada
Posts: 378
RPM Surge while coasting

When my 560SEL is coasting, especially downhill, there is a very noticeable surging happening. The tachometer shows 200-300 rpm changes but you can feel it as well. Since it happens while coasting, it seems to be related to a sensor reading the high vacuum incorrectly. Could this be a problem with the oxygen sensor or some other sensor?

1967 250SL
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