PeachParts Mercedes-Benz Forum - '73 450sl engines surges at idle until up to temp

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Chaosmosis

07-25-2003 05:29 AM

'73 450sl engines surges at idle until up to temp

Injector points were just replaced and a sticking air control valve was replaced, the engine hunts (surges) until it gets to 80 degrees Centigrade then smoothes out and runs fine...
Any ideas???
Thanks,
George

mbdoc

07-25-2003 08:29 AM

That car has a thermostatically controlled additional air valve that operates when the engine is cold, common failed part. MB part number 000-141-03-25 with list of $202.

deaconblues

07-25-2003 11:39 AM

What is the idle speed when the car is fully warmed up (in park or neutral)?

Sounds like it might be set too high....

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