[220_mark]

right just bought myself a 2.0 ltr rover 220 coupe but the thing is the car starts fine on start up starts first turn of the key but it idles at exactly 2000 rpm now this seems fairly strange to me car also has a blowing in the exhuast but cant see how that would effect the idiling of the car

ive checkd cylinder head etc but oil etc is fine any help would be apprecaited

[matthewsemple]

It sounds like the stepper motor is stuck. Does the idle ever slow down when the car has warmed up?

[220_mark]

the idle slows down when going round corners and roundabouts etc my dad was very impatient with it today so he wouldnt let the car properly warm up so gonna go back and try again tommorow on my own ! :

[tompinney]

First port of call would be to try resetting the stepper motor on the throttle.

Stick the ignition to position II and fully press the accelerator 5 times, you should hear a whirr/clicking from the throttle body, then turn the iginition off and it should have reset itself.

[Max-Vel-Khan]

If nothing else is helping, you might consider to renew your lambda oxygen sensor (that thing located in the exhaust right in front of the engine with a wire attached to). Faulty lambda readings may also result in higher idle revs.

When driving whilst the coolant temperature is still very low, I'd consider 2000rpm as quite normal for an idling engine. My one does the same for the first kilometre (1.6 litre honda dohc in a 216 cabriolet).

[E_T_V]

I'd replace the coolant temperature sensor before the lambda sensor as it is about 1/5th of the price and a lot more common to fail.

As a rough guide if there is an idle problem the order I'd do things are this:
(N.B. I'm not saying this is correct, but it is the order I do stuff in).

Reset stepper motor
Check for air leaks from the manifold/throttlebody area - Check hoses gaskets etc
Check/change the coolant temperature sensor
Clean throttle body (the small air bleed passage often becomes blocked with dirt).
Check lambda sensor is cycling when engine is hot. (usually 0.2 to 0.8 volts about once or twice a second).

[Long_guts]

I believe it should tick over at about 1200 rpm thats about what mine idles at (2.0 nasp) 2000 seems a tad excessive

[E_T_V]

It should tick over below 1000rpm when warm and usually slightly above this when cold

[tompinney]

My nasp idles around 1000rpm tops when cold and 850rpm when up to operating temperature, which is what the RAVE says it should be.

You could also check your MAP sensor and it's associated pipe aren't gummed up with oil, that can also cause a dodgy idle.

Also try giving the bumpstop switch thingy on the throttle body a clean. Its where the the sprung part of the throttle that links the cable to the butterfly valve thingy stops up against. Don't know how better to describe it. I'll try and get a photo if you're confused.