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Can someone tell me how to increase the idle speed on a 1979 fuel injection 450 s l ? It runs around 650 r.p.m.now ,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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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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