High (circa 1500 rpm) idle, D5 185.

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High (circa 1500 rpm) idle, D5 185.

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Diesel Engines A forum dedicated to diesel engines fitted to Volvo cars. See the first post in this forum for a list of the diesel engines.

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Jan 10th, 2015, 17:56

#10

5cilinder

Premier Member

Last Online: Yesterday 16:58

Join Date: Oct 2011

Location: Groningen

Quote:

Originally Posted by ppj

Could be a dodgy coolant temp sensor, if the sensor has failed in such a way that the engine ECU thinks the engine is too hot it can cause all sorts of funny things to happen like fans coming on, unusual fueling causing high idle, the dash sensor will be different to the engine sensor so it wont look like a hot condition to the driver, worth plugging it into VIDA and check what temp the ecu thinks the engine is at. Does the glow plug lamp come on when engine is cold? If not then it may think the engine is too hot.

You can rule this out for certain, the high idling only occurs after hard braking with abs activation , also my coolant sensor was ok during these instances

Lately the high idle doesnt always come up with hard braking

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