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Author Topic: corsa c misfire  (Read 18008 times)

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spud1990

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corsa c misfire
« on: 23 February 2013, 21:06:29 »
can anyone help? iv got a 2005 corsa c twinport. engine management light on fault codes are PO300 PO301 PO304 PO302. car drives fine untill you let it idle then after 30secs the engine management light will start 2 flash ane the engine misfires. turn it off and restart its ok for another 30secs. iv changed plugs coilpack and fuel filter. has anyone had the same problem?  :y :y :y :y :y
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mantahatch

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Re: corsa c misfire
« Reply #1 on: 23 February 2013, 21:16:30 »
May sound stupid but has the battery been disconnected ? if so can cause problems until driven for a few miles. The Corsa seems to be very susceptible to issues with a dodgy battery.

Not saying this is your problem but it was on sons girlfriends Corsa SXi. New battery and drive round and all was sorted.
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spud1990

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Re: corsa c misfire
« Reply #2 on: 23 February 2013, 21:29:24 »
the battery has not been removed. i will try a battery on it tomorrow. its mad :D :D you can drive it at 60 all day. pull up at a junction ant it will start 2 misfire.   :'( :y :y :y :y
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mantahatch

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Re: corsa c misfire
« Reply #3 on: 23 February 2013, 22:00:25 »
If it is starting ok then I would think the battery is fine and won't need changing, sorry about that.
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Broomies Mate

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Re: corsa c misfire
« Reply #4 on: 23 February 2013, 22:32:56 »
Blocked CAT is going to be my bet.
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symes

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Re: corsa c misfire
« Reply #5 on: 23 February 2013, 22:35:39 »
what size engine is corsa?
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tidla

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Re: corsa c misfire
« Reply #6 on: 23 February 2013, 22:37:21 »
In the spirit of mr dtmd something,

Stop guessing and what do the codes mean?
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Broomies Mate

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Re: corsa c misfire
« Reply #7 on: 23 February 2013, 22:38:56 »
All the codes relate to misfiring cylinders.  :y
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tidla

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Re: corsa c misfire
« Reply #8 on: 23 February 2013, 22:42:38 »
Ok, heres my guess, the inlet manifold studs break of/ come loose and let loads of air in. A physical grab of the manifold sometime tells.
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symes

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Re: corsa c misfire
« Reply #9 on: 23 February 2013, 22:52:41 »
po300-missfire po301-No1cyl missfire po302 No2 cyl missfire  po304-No4 cyl missfire
cause=air leak/ fuel injector system/maf or ecu HTH :y
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Marks DTM Calib

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Re: corsa c misfire
« Reply #10 on: 23 February 2013, 23:21:06 »
What state is the egr in?
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tidla

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Re: corsa c misfire
« Reply #11 on: 23 February 2013, 23:34:34 »
Quote from: Marks DTM Calib on 23 February 2013, 23:21:06
What state is the egr in?

When its stuck it throws a code of its own i recon.?
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symes

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Re: corsa c misfire
« Reply #12 on: 23 February 2013, 23:40:05 »
Quote from: tidla on 23 February 2013, 23:34:34
Quote from: Marks DTM Calib on 23 February 2013, 23:21:06
What state is the egr in?

When its stuck it throws a code of its own i recon.?
po 171-po174 :y
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zirk

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Re: corsa c misfire
« Reply #13 on: 24 February 2013, 00:18:08 »
With the misfire codes then a stupid question, spark plugs, leads and Dis Pack , in that order.

Not sure about the Corsa C, but the Corsa B's where prone for Lambda Sensor (O2) fails over time, causing the ECU to having to re learn to the extent it would run rough / missfire on idle, worth a thought.

Does it run better after a good Italian Tune Up / Thrashing?
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spud1990

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Re: corsa c misfire
« Reply #14 on: 24 February 2013, 18:16:38 »
its a 1.2 16valve i will check inlet manifold tomorrow. iv changed 02 sensors today but still no joy. thanks for all your info.  :y :y :y
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