V40 2.0T Idling issue

LS3 · Feb 15th, 2011, 20:41

Hi,

Just been tinkering with my bus, trying to sort out an idling issue.

Car runs OK when driving along, but when idling, sometimes the revs drop until the engine nearly stalls. Other times it'll jump up to about 1300rpm without pushing the accelerator. Seems worse if you rev the engine slightly while the car is not moving, then release the accelerator.

Tried cleaning the MAF wire with electronic solvent cleaner spray, installing a new air filter as the old one was crushed and distorted (?), and cleaning the plugs which were blackened.

Any ideas please?

gmain1967 · Feb 15th, 2011, 20:51

Idle control valve at the front of the engine under the plastic cover. Two torx bolts to remove (plus wiring connector) and spray with carb cleaner or similar. Clean it out with a rag and put back. You'll most likely get a load of black gunk out of it....! It's under the blue cover at the front of the pic below (your's will be black unless it's painted!)

10 min job

LS3 · Feb 15th, 2011, 21:06

Is that the thing with the butterfly flap (throttle body?) in it? Sorry, I forgot to mention I cleaned that out too

LS3 · Feb 18th, 2011, 09:38

Found the idle control valve, cleaned it and put it back on - cars running like new!!

Chuffed to bits - thanks again for your help gmain1967

Feb 15th, 2011, 20:41	#1
LS3 New Member Last Online: Feb 18th, 2011 09:38 Join Date: Feb 2011 Location: Workington	V40 2.0T Idling issue Hi, Just been tinkering with my bus, trying to sort out an idling issue. Car runs OK when driving along, but when idling, sometimes the revs drop until the engine nearly stalls. Other times it'll jump up to about 1300rpm without pushing the accelerator. Seems worse if you rev the engine slightly while the car is not moving, then release the accelerator. Tried cleaning the MAF wire with electronic solvent cleaner spray, installing a new air filter as the old one was crushed and distorted (?), and cleaning the plugs which were blackened. Any ideas please?

Feb 15th, 2011, 21:06	#3
LS3 New Member Last Online: Feb 18th, 2011 09:38 Join Date: Feb 2011 Location: Workington	Is that the thing with the butterfly flap (throttle body?) in it? Sorry, I forgot to mention I cleaned that out too

Feb 18th, 2011, 09:38	#4
LS3 New Member Last Online: Feb 18th, 2011 09:38 Join Date: Feb 2011 Location: Workington	Found the idle control valve, cleaned it and put it back on - cars running like new!! Chuffed to bits - thanks again for your help gmain1967

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