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1981 280CE
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Hello everyone,

Can anybody tell me if the "Idle Valve" is the same as the "Cold Start Valve".
My mechanic tells me the "Idle valve" is not working and I want to know if its the same as the "Cold Start Valve" in order to buy a new one online.

Regards,

Max Hofer.
 

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Idle valve

The cold start valve definitely isn't an 'idle valve' because it only runs while the engine is starting (if the engine thinks it's cold enough to need it). It doesn't run during idling.

As far as I can remember the system doesn't have a separate idling circuit, so I don't know what an 'idle valve' would be!
 
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