i had this problem and it was the water temp sensor in the thermostat.

suppose so, i didnt think of that. my bad

quote:

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Originally posted by george
disconnect the battery for about 15-20 mins, this will reset the ecu. then reconect and start her up and the ecu will reset all sensors. also could be the throttle position sensor, its right next to the icv. change that if the ecu reset doesnt work. hope this helps

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disconnect the battery for about 15-20 mins, this will reset the ecu. then reconect and start her up and the ecu will reset all sensors. also could be the throttle position sensor, its right next to the icv. change that if the ecu reset doesnt work. hope this helps

since the new ecu after 30-40 miles of driving the idle and cutting out got worse and seems to not be getting better. Do you think because of the new ecu its responded in this way and is having trouble calibrating to it?

as daz said the icv and other sensor have to self map and calibrate to the engine, i cant see you stepping the icv up on it, not 100% tho

Tom

thanks for replies i will check map sensor.

the icv was a new one and the guy at my garage has just told me if i pop it down to him on monday theres a lad he knows at vauxhall and hes gona find out how much we can step the icv up. Sound right?

check for air leaks ect, corsas usually have this problem when the speedo isnt working, was the icv u changed a bran new 1??

i had this problem...turned out it was the map sensor hose had a crack in it...check yours, my garage sid hes had several corsas in with cracked ones...hope this helps
Tom

mm tell me more please???

dont the ecu's have to learn?

tps?

yep

does the speedo work?

Ok after changing numerous mass air flow sensors and a new icv, my mechanic told me from the codes my ECU was giving out that it was that (the ecu) which was goosed!

Got a second hand ECU and put that in yesterday. The car doesn't lack power anymore, doesnt jerk when coming off accelerator and responds as soon as the pedal is touched which it didn't do before...

There is still a problem though which seems to have got worse since! When i start the car up it has a problem to keep going and cuts out or will rev very very low and seems to get worse right down to about 200 revs where the whole car shakes to fk! Before the new ECU was put in it was'nt this bad. To keep it running i have to use accelerator when i start it up.

If i am also coming up to a junction to stop or go very slow the engine just cuts out and has to be started up again, and the only way to stop this is to put it in neutral as i'm coming up to the junction with some speed. Although the revs drop the cars keeps running.

ANY ideas????

[Edited on 21-10-2008 by marklaruk]