Corsa B 99 Idle Help

[fragmayo]

Hi Guys


I have a 1L 99 Model corsa B, and when I purchased the car, it was idling so low, it would cut out if i took my foot of the accelerator. so I looked up a guide on your forums, showing me how to sort this issue out. I took the idle control valve off, and all the pipes of the engine and gave them all a good clean, then when I put everything back together the car has started idling to fast. it now idles so fast it can drive itself.

However, when I first start the car in the morning, it will idle really low, then after 5 mins of driving it will gradually go up, until its idling stupidly high.


When I cleaned everything, I also disconnected the battery for an hour as suggested to reset the ECU.


Any help would be appreciated,

Thanks
Daniel Bell

[Blackie_No1]

I'd say the first culprit to look at is the ICV(Idle Control Valve) or some places call it an Idle Stepper Motor.

[fragmayo]

Hi Blackie


I have taken off and cleaned the idle control valve, as mentioned on these forums.

Is there any way I can test if the issue is being caused by the idle control valve.


Thanks
Dan

[Blackie_No1]

If you can get the hold of someone who's 1.0 corsa is running fine and swap it over for a few mins

Did you oil it after you cleaned it?

[fragmayo]

No Im the only person I know with one, and yes it was oiled mate.

it seems to work better when I disconnect it from the ECU lol = 0

Thanks
Dan

[fragmayo]

Hi guys

The EML is on, do you think it would be worth doing the paperclip test to try and find the issue,


Thanks
Dan

[fragmayo]

Scrap that

apparently I cannot do the paperclip test on the 1L 1999 model.

[fragmayo]

Can someone provide a list of issues that may cause my car to idle to high ?


Thanks
Dan

[CorsaBLuke]

Your timing could be out mate

[Blackie_No1]

Iirc the 99 1.0 is the 3cyl chain driven lump so unlikely to be timing, not unless in the unlikely event it has skipped a tooth. If the HG has been done recently then I guess the chain may have been put on with incorrect timing, but it would have to be a moron to have done that.

ICV, vacuum hoses, TPS, dirt in throttle body holding butterfly valve open, butterfly valve broken, ECU,

[williamt73]

Hi Guys


When I cleaned everything, I also disconnected the battery for an hour as suggested to reset the ECU.

I don't beleive that disconnecting the batery on these resets the ECU. You need to reset the ICV using OpCom or something similar.

[johnny]

Hi Guys


When I cleaned everything, I also disconnected the battery for an hour as suggested to reset the ECU.

I don't beleive that disconnecting the batery on these resets the ECU. You need to reset the ICV using OpCom or something similar.

Works on 8v models but not ecotec models