Rough idle 500 sel 1984 - Mercedes-Benz Forum

 
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post #1 of 3 (permalink) Old 03-13-2009, 09:04 PM Thread Starter
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Rough idle 500 sel 1984

Replaced fuel filter check for vacuum leaks idle control and valve good. Does anyone know if there are fuel strainers in fuel distributor?
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post #2 of 3 (permalink) Old 03-13-2009, 09:10 PM
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Not exactly sure what that means, but I wouldn't be opening up your fuel distributor if I were you. If the diaphragm is bad, you won't find a replacement part anyways...

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post #3 of 3 (permalink) Old 04-14-2009, 12:14 PM
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Once you have determined that there are no vacuum leaks, plugs and wires, rotor and cap are good, and the vacuum control valve are ok, the culprit is usually the idle control unit. It is found under the carpeted toe board on the passenger side of the car. It gets really technical to test them, and my suggestion would be to just buy another one. You can get them pretty cheap at any parts yard.
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