Plymouth_Corsa
Member
Registered: 23rd Sep 02
Location: Plymouth Drives: Carzone Corsa
User status: Offline
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A few weeks back my engine management light came on when the car idled, and then the revs would drop to about 500rpm and it would sound like it was about to stall, although it never did.
I got the car on the ramps at work, and found that the exhaust manifold had a crack in it, so £140 later that was changed and the loud blow from the front of the car went, I thought this would have also cured the light from coming on, but it has not cured it.
Anyone got any ideas whats happening with my engine!?
It runs fine, but just when it idles it seems to run really rough, and sounds like its switching from 3 to 2 cylinders...
Ive checked the plugs and they all seem okay, have also tried it with another set just in case, but nothing changed. 
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BeArDy
Member
Registered: 7th Aug 00
Location: Manchester
User status: Offline
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air flow meter, lambor sensor......
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matt_jonesuk
Member
Registered: 27th Feb 03
Location: worcester
User status: Offline
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does it run like that all the time or jus when it is cold + when u take the foot off the accelator does it sometimes still rev for a couple of seconds after?
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puchos
Member
Registered: 7th Apr 03
Location: North Wales
User status: Offline
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had a similar problem with mine but mine kept cutting out. it was the mass air flow meter and the idle control valve that was causing the problem. had them replaced, and is fine now, but costly though!
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Kerry
Member
Registered: 5th Oct 01
Location: Norwich
User status: Offline
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my light comes on after a long journey and it annoys me. there is no reason for this other than a possibilty of lose wires. take your car to vauxhall and get it on tech 2 or something or use the old paperclip method  you could also check your pipes for small splits as i had one in the piece between the air flow meter and inlet manifold which caused my car to idle uneven...i just taped it up temporarily and stil havnt got round to replacing it 
[Edited on 18-05-2003 by Kerry]
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miles
Member
Registered: 25th Mar 02
Location: plymouth Drives: Astra Sport
User status: Offline
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Kerry, I bet your faults are for the EGR.
Hmmmmm, actually, if you have an air flow meter, no egr......
Cris,
Why didn't you just weld the crack?
Reset the ecu and clear the fault, see what comes back. Then go from what the code says......
Lambda sensor is not used at idle i dont think.
Could be idv, they are always playing up.
But the easy way to find the problem and end the guessing is to read the codes! Only takes 2 mins to do it!
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Scott M
Member
Registered: 15th Feb 01
Location: Bexleyheath, Kent
User status: Offline
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Sounds like idle control valve to me.
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