Daewoo Lanos high Idle speed

Is it warming up properly?

AFAIK, these have a separate wax stat which lifts idle speed independantly to the ISCV when the engine is cold.

Tim..

There is a known fault on some Lanos that cause high idle and need an ECU software update. If you don't fancy paying Daewoo there is a temporary fix by:

Ignition On Disconnect Idle Speed Control Valve Ignition Off Re-connect Idle Speed Control valve Repeat 4 or 5 times Start Vehicle - It shouldn't idle unassisted so use the throttle. Keep vehicle idling on throttle to initialise self learn process It should now idle within parameters.

Hi,

Thanks for the speedy responses. The engine warms up fine, but even when cold the idle seems faster than I would expect. Any idea where the wax stat would be ?

I will try the temp fix, and let you know if sucessful or not... fingers crossed,

Paul...

Yes, on the inlet manifold. It acts directly on a supplimental air passage on the manifold. (rather than mechanically on the throttle linkage)

Tim..

Fantastic, the unplug ICV + ignition on/off trick worked !! Thanks ever so much for your help, now happily idling at about 800rpm.. I no longer sound like a boy racer ;-)

Paul...

Yes that seems to do the trick on these motors. Just repeat if the problem re-occurs. Another annoying problem I found on the Lanos is that when the car is rolling forward the speed sensor increases the revs to about 1300rpm but sometimes (especially if in heavy stop-go traffic) when the vehicle comes to a halt the revs don't always drop, but if you edge forward a couple of feet and stop again they will drop to normal.

replying to paul.wordingham, fonda wrote: tps sensor or control valve, when changed must remove one battery lead for 2 minutes for cpu to reset

High John, now that Daewoo are no longer around as a company do you know how i could go about getting this same service? My 03 Kalos is having the same symptoms as discussed.

I hawe also problem with worming up engine. I decide to change termostat and I hope that failor will be removed and solved.

Thank you John....Thank you very much. I too had a very high idling issue on my 1997 1.6LTR Daewoo Nubira. It was idling high at 1600rpmfor a few weeks now and this afternoon it suddenly jumped to 3500rpm! Finding your idle speed control valve / ignition disconnect/connect procedure above completely fixed the problem. Mate, you're a champion! Thanks once again from Adelaide, South Australia Cheers, Con