Omega Owners Forum
Chat Area => General Car Chat => Topic started by: spud1990 on 23 February 2013, 21:06:29
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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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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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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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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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Blocked CAT is going to be my bet.
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what size engine is corsa?
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In the spirit of mr dtmd something,
Stop guessing and what do the codes mean?
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All the codes relate to misfiring cylinders. :y
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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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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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What state is the egr in?
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What state is the egr in?
When its stuck it throws a code of its own i recon.?
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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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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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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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What state is the egr in?
When its stuck it throws a code of its own i recon.?
It depends how far open it it :y
The real answer to the whole thread is to check the live data........
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i disconnected cam sensor no misfire but still come up with the same codes. so i changed the cam sensor and its still the same. im pretty sure i have found the cause. i will get Mrs T to upload picks later and c what you all think. :y :y :y :y :y :y
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So thats:
Spark plugs.
coil pack.
fuel filter.
o2 sensors.
cam sensor.
Code reader with live data might be worth sticking on the shopping list.
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(http://i832.photobucket.com/albums/zz241/spud1990-2010/CORSA/045-1.jpg)
(http://i832.photobucket.com/albums/zz241/spud1990-2010/CORSA/044.jpg)
(http://i832.photobucket.com/albums/zz241/spud1990-2010/CORSA/046-1.jpg)
(http://i832.photobucket.com/albums/zz241/spud1990-2010/CORSA/047-1.jpg)
(http://i832.photobucket.com/albums/zz241/spud1990-2010/055.jpg)
(http://i832.photobucket.com/albums/zz241/spud1990-2010/056.jpg)
(http://i832.photobucket.com/albums/zz241/spud1990-2010/057.jpg)
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Oh dear, better get that head off then.....does the timing chain rattle badly?
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Châteauneuf-du-Pape :-[
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the sump was full of s..t. causing low oil pressure on tick over causing it to go into limp mode by shutting the injectors down giving the code multiple misfire. thats my theory. gonna clean all the oil ways and put it back together. fingers x it will cure it. :y :y :y :y :y
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I fear you may need to cross more than that,
Low oil pressure won't result in the ecm shutting down cylinders.
What's the service history like?
The crudd is Mayo due to water mixing with the oil
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the engine sounded as they all do no chain rattle. had it turning over with rocker cover off and only small amounts of oil was coming :'( :'( :'( :'( up.
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I'm confused ::)
This thread was talking about a misfire and various sensors... then a load of pics of what looks to be gummed up valve cover and a bent oil filter (?).
Can someone explain what's happened :)
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note to self... must type faster ::)
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its a customers car and shes had it a long time and never had it serviced :'( :'( :'( :'( i put the codes in google and had a read through. a bloke had the same problem. his engine looked just like this 1. he cleaned it all out got the oil flowing and problem was solved. just hope its the case 4 this. only time will tell :y :y :y
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I'm confused ::)
This thread was talking about a misfire and various sensors... then a load of pics of what looks to be gummed up valve cover and a bent oil filter (?).
Can someone explain what's happened :)
So, some oil contamination (water), this has clogged things up and the oil pump has collapsed the oil filter its so clogged.
Oil filters normally collapse due to crudd and not Mayo hence question about service history
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the oil filter was breaking up. blocking the engine. im trying 2 fix the misfire this could help. :y
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its a customers car and shes had it a long time and never had it serviced :'( :'( :'( :'( i put the codes in google and had a read through. a bloke had the same problem. his engine looked just like this 1. he cleaned it all out got the oil flowing and problem was solved. just hope its the case 4 this. only time will tell :y :y :y
And the customers stupidity has come home to roost. :y
Servicing as we all know is a major requirement for valid reasons with the consequences being very serious.
The issue I have is that the question regarding where the water has come from remains unanswered and if it was oil starvation then it would have been noisy (top end, chain rattle, big ends) plus oil starvation won't cause a miss fire.....so keep us posted
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I'm confused ::)
This thread was talking about a misfire and various sensors... then a load of pics of what looks to be gummed up valve cover and a bent oil filter (?).
Can someone explain what's happened :)
So, some oil contamination (water), this has clogged things up and the oil pump has collapsed the oil filter its so clogged.
Oil filters normally collapse due to crudd and not Mayo hence question about service history
i did wonder about the water contamination but thought it looked more like mayo as opposed to the stuff built up in that valve cover :y
thanks for explanation though :y :y :y :y
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look this up on google might explan it for you all. Vauxhall Corsa Misfire Detected P0304 P0302 P0301 P0300 Fix ...
http://www.bargainspares.com/vauxhall-corsa-misfire-detected...
6 Feb 2013 ... p0304 cylinder 4 misfire detected corsa astra vauxhall 300x206 ... Anyway, I
digress as always – This misfiring Vauxhall corsa is a 2001 Corsa C 1.2 1199cc
... multiple random misfires detected P0300 corsa 300x236 Vauxhall ... coppy this and put into google it will come up.
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im not sure where the water has come from. she said it was not using any water. i will keep you all posted :y :y
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That's the worry...that's a lot of water and not something seen in your link.
Oh yes, the plastic will be from the timing chain guide
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That's the worry...that's a lot of water and not something seen in your link.
Oh yes, the plastic will be from the timing chain guide
Front timing chain cover gasket behind water pump can let water into sump,seen a couple of headgaskets changed on these needlessly :-\
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That's the worry...that's a lot of water and not something seen in your link.
Oh yes, the plastic will be from the timing chain guide
Front timing chain cover gasket behind water pump can let water into sump,seen a couple of headgaskets changed on these needlessly :-\
:y
Worth a clylinder leakage test to discount head gasket and coolant pressure test to prove timing cover gasket leak.
edit. (noted no water loss?, even if it was entering the sump via water pump seal, it still a loss of coolant and possible increase in oil level?)
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That's the worry...that's a lot of water and not something seen in your link.
Oh yes, the plastic will be from the timing chain guide
Front timing chain cover gasket behind water pump can let water into sump,seen a couple of headgaskets changed on these needlessly :-\
:y
Worth a clylinder leakage test to discount head gasket and coolant pressure test to prove timing cover gasket leak.
edit. (noted no water loss?, even if it was entering the sump via water pump seal, it still a loss of coolant and possible increase in oil level?)
Looking at the pictures I find it hard to believe that there is no water loss unless some dopey dipstick has added water via the filler cap by mistake ::)
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Any updates? Like to see a story thru.
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good news. i blew all oil ways through and cleaned the engine. put it all together and problem solved. no misfire. iv done 150 miles in the car and there is no water loss. so glad its fixed. :y :y :y :y
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So far so good.
So the cause is the plastic chain tensioner breaking up which then blocks the oil way to the head which starves the tappets of oil.
going to read it again.
1, The knock sensor causes the misfire from the noise created from the tappets?
2, valves opening late/closing early due to hydraulic tappets empty?
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there was no plastic in the sump. just alot of shit and small pieces of oil filter. i took out the tappets and blew the oil ways out. had alot of small pieces of paper from the filter come out. read it again iv looked at it a few times. glad it has solved the problem. :y :y :y :y