marklaruk
Member
Registered: 4th Sep 04
Location: Leeds
User status: Offline
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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]
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Richardhhha
Member
Registered: 29th Sep 07
Location: Croydon, Greater London
User status: Offline
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does the speedo work?
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marklaruk
Member
Registered: 4th Sep 04
Location: Leeds
User status: Offline
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yep
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DAZ1985
Member
Registered: 3rd Sep 06
Location: Scholar Green, Cheshire
User status: Offline
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dont the ecu's have to learn?
tps?
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marklaruk
Member
Registered: 4th Sep 04
Location: Leeds
User status: Offline
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mm tell me more please???
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doncs
Banned
Registered: 8th Jul 08
User status: Offline
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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
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boz_gsi
Member
Registered: 12th Apr 07
Location: stoke-on-trent
User status: Offline
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check for air leaks ect, corsas usually have this problem when the speedo isnt working, was the icv u changed a bran new 1??
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marklaruk
Member
Registered: 4th Sep 04
Location: Leeds
User status: Offline
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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?
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Torsa g
Member
Registered: 20th Sep 07
Location: Tamworth. Rides: An OSTRIDGE
User status: Offline
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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
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marklaruk
Member
Registered: 4th Sep 04
Location: Leeds
User status: Offline
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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?
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george
Member
Registered: 23rd Feb 08
Location: Rainham, Kent
User status: Offline
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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
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Brett
Premium Member
Registered: 16th Dec 02
Location: Manchester
User status: Offline
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quote:
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
If he's bought the ECU second hand, then surely it will have been disconnected for way longer than 15-20mins anyway 
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george
Member
Registered: 23rd Feb 08
Location: Rainham, Kent
User status: Offline
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suppose so, i didnt think of that. my bad
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jamiegap2007
Member
Registered: 13th Feb 07
Location: clacton on sea, Essex
User status: Offline
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i had this problem and it was the water temp sensor in the thermostat.
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