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View Full Version : GU TD3.0 High RPM at idle when hot.



robbo71
7th June 2011, 09:33 PM
I assume this may be electrical but could alos be classed in the engine sub forum but here it goes..

I have developed an issue with my automatic 3.0TD GU when the engine has warmed up and in neutral it is idleing at +1200 RPM.
--When engine is cold, idle is correct at approx 850 RPM. When drive is engaged idle speed is OK.

--ISSUE: After a couple of minutes when engine temp is warm and in neutral RPM sits around +1200.

--Cold start heat switch on the lower right of the dash works fine when engine is cold lifts the RMP to approx 1200 which it should do. When drive is selected idle speed reduces and appears OK.

--When engine is hot and drive is engaged engine idle speed reduces and seems OK and not over driving the vehicle.

I assume it is as simple as a temp switch or a temp solonoid somewhere but any ideas where to start looking would be appreciated before I go off to seek a mechainc and spend potentially too much money.
Thanks