high revs on idling

[kenj5]

my 1999 1.8 is reving very high when idling... up to 2500. When I turn the air conditioning on and open vents fully it drops back down to around 800-900 rpm. Can anyone point me in the right direction where to start looking for the root causal. thermostat?

[woko]

I would be looking at the idle air control valve. These need to be set with a computer

Sent from my GT-I9295 using AULRO mobile app

[kenj5]

does this entail going to a land rover dealership or can it be done elsewhere

[woko]

It can be done elsewhere but will need to be done at a LR specialist as they will have the required computer to do it. Sorry I cant help you with where, I'm on the other side of the country. I have a hawkeye and it should do it (I haven't done it with a hawkeye but is listed it will)

[kenj5]

sorry Woko to show my ignorance but what do you mean by hawkeye

[woko]

Its a hand held computer for Land Rovers. Google Bearmach Hawkeye. This will give you a picture of one.

Sent from my GT-I9100T using AULRO mobile app

[kenj5]

I have found the idle air control valve to be faulty but have so far been unable to find anywhere that can help me locate a new or reconditioned one. Have tried Barbagello to no avail and tried a few wreckers. Does anyone know of a freelander in perth being sold for spares or where would be best to locate a new or used idle air controller valve

[woko]

Here's one on ebay in the UK. Rover 75. MGZT. Stepper motor. (1.8. MDQ100170.) | eBay (http://www.ebay.co.uk/itm/Rover-75-MGZT-Stepper-motor-1-8-MDQ100170/161316895564?_trksid=p2047675.c100005.m1851&_trkparms=aid%3D222007%26algo%3DSIC.MBE%26ao%3D1%2 6asc%3D20140122125356%26meid%3D58d7390ff9744e16889 a782624169033%26pid%3D100005%26prg%3D2014012212535 6%26rk%3D2%26rkt%3D6%26sd%3D361094855388&rt=nc)

Here's the part number MLZ100050L from Land Rover.
MDQ100170 for Rover. (same part)