increase idle on fuel inj. 79-450 s l - Mercedes-Benz Forum

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post #1 of 3 (permalink) Old 04-16-2009, 07:04 AM Thread Starter
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increase idle on fuel inj. 79-450 s l

Can someone tell me how to increase the idle speed on a 1979 fuel injection 450 s l ? It runs around 650 ,but seems as if it gets too much gas after it sits too long on idle and will die. Would increasing to around 850 r.p.m. help this stop the problem on an extended idle?Thanks for anyone who can answer. Rick
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post #2 of 3 (permalink) Old 04-16-2009, 12:00 PM
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Date registered: Feb 2009
Vehicle: 1979 450 SEL
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It might be your timing. I have a 450 SEL (might be similar?) and the idle adjust is a little white screw forward of the fuel distributer.

Adjust Idle Speed

1979 450 SEL "Spinne Blaue"
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post #3 of 3 (permalink) Old 04-23-2009, 01:22 PM
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Vehicle: 1973 450 SL AMG, 1999 ml320
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It sounds like the cold start valve. Get the hannes Manuel for where the valve is. This is very comin. also go to the r107 forum
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