Lee Wilson
Member
Registered: 20th Feb 06
Location: Fareham, Hants Drives: XE Corsa
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Started my car up yesterday when i finished college and it was misfireing, then was fine all last nite.
Woke up thismorning and doing it again, Sounds like a demented scooby
Any Ideas what the problem is?
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Born_corsa02
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Registered: 20th Dec 02
Location: Essex
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Have you checked all the HT leads are on
properly?
Could be anything is the EML on?
When were the plugs last changed?
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Lee Wilson
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Registered: 20th Feb 06
Location: Fareham, Hants Drives: XE Corsa
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Il check all the HT leads and when the plugs were changed in a bit.
EML Light isnt on though
Hoping it isnt anything to bad!
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Born_corsa02
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Registered: 20th Dec 02
Location: Essex
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Check the basics first could just need some new plugs or leads
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Marc
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Registered: 11th Aug 02
Location: York
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Check air flow meter too.
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3CorsaMeal
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Registered: 11th Apr 02
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i've had it happen to mine a couple of times and was HT leads first time (v.hard to spot) i noticed sparks flying out of them when it was dark, listen to them closely 
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Dave A
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Registered: 10th Dec 03
Location: County Durham
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quote:
Originally posted by Marc
Check air flow meter too.
doesnt have an air flow meter 
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3CorsaMeal
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Registered: 11th Apr 02
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quote:
Originally posted by Dave A
quote:
Originally posted by Marc
Check air flow meter too.
doesnt have an air flow meter
they do have something to measure air, air mass meter?
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Marc
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Registered: 11th Aug 02
Location: York
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Are you sure about that David?
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Rob B
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Registered: 8th Jan 04
Location: Area Motorsport Drives: Race EP3
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Mine did this, i had split the hose to the MAF sensor, little black box attached to your bulkhead by the header tank...
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Dave A
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Registered: 10th Dec 03
Location: County Durham
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quote:
Originally posted by Marc
Are you sure about that David?
100000000% sure. they use a map sensor to measure manifold vaccum pressure rather than an air mass meter.
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Marc
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Registered: 11th Aug 02
Location: York
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Well could that be a cause of the mis fire?
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Dave A
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Registered: 10th Dec 03
Location: County Durham
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unfortunately, on these engines theres 20+ things that can cause a missfire. any one of the sensors, timing, wiring, earths, injectors........
impossible to 'guess' over the internet. if no em light is coming on then take it to vaux to read the values that each sensor is giving off. thats the easiest and quickest and probably the cheapest way in the long run.
if it is coming on then do the paperclip test
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Rob B
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Registered: 8th Jan 04
Location: Area Motorsport Drives: Race EP3
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IMO Before anything, Check for air leek's i had this just split a hose that was it...
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3CorsaMeal
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Registered: 11th Apr 02
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quote:
Originally posted by Dave A
quote:
Originally posted by Marc
Are you sure about that David?
100000000% sure. they use a map sensor to measure manifold vaccum pressure rather than an air mass meter.
so whats the little sensor that plugs into the duct after air filter but before the inlet? is that the map one?
i'm no guru, so just curious 
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VegasPhil
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Registered: 16th Jan 05
Location: Fareham, Hants Drives: Octavia VRS
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MAP Sensor is the plug about an inch along from the Header Tank Cap.
Corsa 2.0 16v Vegas - Sold
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Dave A
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Registered: 10th Dec 03
Location: County Durham
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quote:
Originally posted by 3CorsaMeal
quote:
Originally posted by Dave A
quote:
Originally posted by Marc
Are you sure about that David?
100000000% sure. they use a map sensor to measure manifold vaccum pressure rather than an air mass meter.
so whats the little sensor that plugs into the duct after air filter but before the inlet? is that the map one?
i'm no guru, so just curious
its the inlet air temp sensor. makes very little difference if its there or not really. adjusts fuelling by a tiny amount. modern cars use the cts as the main temp sensor on the engine
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Will_Sport
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Registered: 28th Jun 04
Location: Notts
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does it only missfire at certain rpm?
mine has done this before... spluttered and sounded like a v6 until 2500rpm, then it was fine, but drop below it was rubbish again until driven for 15 mins
although it seems to have fixed itself lol although did it the other day once or twice which was first time since like jan/feb
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Lee Wilson
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Registered: 20th Feb 06
Location: Fareham, Hants Drives: XE Corsa
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Cheers for replys guys. It only does it if the car is left for a while. When I come back to it and start up again, it misfires for a few minuites and then its fine again. Seems as if its only doing it when its cold. Seems to be alot of condensation coming out my exhaust latley too?
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Dave A
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Registered: 10th Dec 03
Location: County Durham
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cts is the main sensor that the ecu uses to adjust fuelling during warm-up.
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3CorsaMeal
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Registered: 11th Apr 02
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headgasket going?
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Will_Sport
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Registered: 28th Jun 04
Location: Notts
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don't think its headgasket.
i've had mine replaced before and when it was leaking it was only firing on 3 for 30s after starting.
also when mine started doing this i've kept and eye on everything, oil is clean, not going down and coolant is fine as well.
there was a bit of water in my air box from where i drilled it not expecting water to run down side of my bonnet into it so don't know if that was anything to do with it.
strange how mine fixed itself though. just keep driving it matey, keep ur eyes on oil and coolant and see if it sorts itself out?
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Lee Wilson
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Registered: 20th Feb 06
Location: Fareham, Hants Drives: XE Corsa
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Cheers mate, Well i went to get my air con fixed today, all working so happly about that. While i was there i queried about my head gasket as i checked my water today and It was low. The guy measured emisions and he said its on its way out. How much is this gona cost, probably alot on labour rite?
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Will_Sport
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Registered: 28th Jun 04
Location: Notts
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mine cost about £350.
that was with price off:
head gasket set (inc bolts etc)
cam belt roller as one was buggered
head skimmed
price of compression test
oil/coolant etc.
can probs find somewhere that does it a fair bit cheaper than that, i think i paid too much although its a good job done
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Lee Wilson
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Registered: 20th Feb 06
Location: Fareham, Hants Drives: XE Corsa
User status: Offline
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Its anoying because the car seems to be running fine and im hopeing if i get the gasket done its going to be sorted. Its alot of money considering the gasket set is only about 25 quid
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