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  #1  
Old 05-19-2009, 02:00 AM
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Join Date: Mar 2005
Location: Vista, CA
Posts: 345
84 500SEL high idle......sigh....

Been trying to root out all possibilities and this is what i have covered so far.
I checked for vacuum leaks all over. I sprayed carb fluid around the engine with the air cleaner off and got nothing. I checked the idle control valve and swapped it with known working ones to no avail. I confirmed that the idle control box was working. OVP is fine as well. What should i check next? It idles at 1000 and drops down to 900 or so in gear. I will soon be getting a manual for it so i can learn the ways of the mighty benz gas engine

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1979 240D with a 617 turbo diesel.
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  #2  
Old 05-19-2009, 11:45 AM
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Location: Florida / N.H.
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ABS lamp ON ??
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A Dalton
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  #3  
Old 05-19-2009, 06:21 PM
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Join Date: Mar 2005
Location: Vista, CA
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ABS light is not on. I am noticing some cracks in the air/smog? pump hose below the alternator. could this cause a vacuum leak? The car runs very rough until its warm.
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1979 240D with a 617 turbo diesel.
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  #4  
Old 05-19-2009, 07:12 PM
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Join Date: Dec 2007
Location: New Zealand
Posts: 40
Cool rough idle

Had similar problem; Try using an Injector cleaner, as it could be bad Fuel

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