Vehicle & Technical > Range Rover

3.9EFI - Idling too high

(1/3) > >>

TechnoTurkey:
Hi, sorry about the multitude of questions from me at the moment, just trying to get to grips with a few minor bits and bobs that need doing on the Rangy before I have it 'just right'!

It is a 3.9 EFI Auto and seems to be idling too fast, which has the knock on effect being an auto that it 'runs away' a little bit.  Idles at over 1K and goes up to 2k sometimes, how can I get this back to how it should be, do I need to give the stepper motor a clean?

Thanks

DoubleTop:
worth having a look at the mass air flow meter possibly.

DT.

Poprivit-RRC:
I have a problem like this but not as high. i would be interested to know how you get on.

Bowie:
Clean the 'extra air' stepper motor out that's on the back of the plenum, they gum up, pretty common.

Also check ALL hoses ofr air leaks, including the vacuum advance etc.

dod51e:
You could try adjusting the idle valve located in the plenum chamber, far-side near to throttle linkage.  Also check that someone hasn't added mass to the underside of the trottle stop or linkage (where the linkage meets the plenum chamber as there is an adjustment there too.  If this is correct and the airmixture is correct then it may be worth checking the Lambda (oxygen) sensor if you have one.  Air-mass meter another option.  There is no adjustment on these units so if you think it may be faulty try substituting one that you know works from another RR of same age.

Hope this helps.

Mark

Navigation

[0] Message Index

[#] Next page