High Revs

[Chelseabab]

I own a Lexus IS 220d on a 59 plate. I find it hard to understand why, all the time it revs up to 1200 when warming up. Whilst I know why it dose it (temp gauge has to reach central position) I'd like to know if there is a way to stop this happening as its a total waste of fuel. Especially as it takes so long to warm up on cold mornings. Plus this is the first car I've owned that did this.

[Exdee]

Typical Lexus behavior - Nothing you can do about it as far as I am aware as that's the way the ECU has been programmed.

[johnatg]

'Idle-up' is perfectly normal when running cold - it's because a richer fuel/air mixture is being burnt. All cars do it - otherwise there would be danger of stalling when any load is put on the engine - maybe you just haven't noticed before! (because the Lexus runs so quietly at normal idle and the rev counter is very accurate)

It has nothing directly to do with raising engine temperature, but coolant temp is one of the vital parameters the ecu uses when computing fuel injection quantity. In the olden days, pulling our chokes out (ask your dad!) used to raise revs quite a bit! :eerrrmm:

[Captain Fizz]

Also helps charge the Battery better.

Try turning off the cabin fans + AC. Found that stopped it.

(But quite like the fact it does it)

[Steve_M]

Turn th a/c off until the engine is up to temp. engine revs drop to tick over when you do this. ( at least mine does )

[Chelseabab]

'Idle-up' is perfectly normal when running cold - it's because a richer fuel/air mixture is being burnt. All cars do it - otherwise there would be danger of stalling when any load is put on the engine - maybe you just haven't noticed before! (because the Lexus runs so quietly at normal idle and the rev counter is very accurate)

It has nothing directly to do with raising engine temperature, but coolant temp is one of the vital parameters the ecu uses when computing fuel injection quantity. In the olden days, pulling our chokes out (ask your dad!) used to raise revs quite a bit! :eerrrmm:

'Idle-up' is perfectly normal when running cold - it's because a richer fuel/air mixture is being burnt. All cars do it - otherwise there would be danger of stalling when any load is put on the engine - maybe you just haven't noticed before! (because the Lexus runs so quietly at normal idle and the rev counter is very accurate)

It has nothing directly to do with raising engine temperature, but coolant temp is one of the vital parameters the ecu uses when computing fuel injection quantity. In the olden days, pulling our chokes out (ask your dad!) used to raise revs quite a bit! :eerrrmm:

'Idle-up' is perfectly normal when running cold - it's because a richer fuel/air mixture is being burnt. All cars do it - otherwise there would be danger of stalling when any load is put on the engine - maybe you just haven't noticed before! (because the Lexus runs so quietly at normal idle and the rev counter is very accurate)

It has nothing directly to do with raising engine temperature, but coolant temp is one of the vital parameters the ecu uses when computing fuel injection quantity. In the olden days, pulling our chokes out (ask your dad!) used to raise revs quite a bit! :eerrrmm:

[Chelseabab]

Thanks guys for your comments, just noticed I posted this same subject in feb.sorry early stages of dimensia !!!! Oh yeah would ask my old man John but sadly he's been dead for 3 years.plus what he knew about car's you could write on a postage stamp ha!!!! Sorry Pa.