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Hi i have a cylinder 4 misfire code on my Vauxhall corsa ...


Hi i have a cylinder 4 misfire code on my Vauxhall corsa and i have changed the ignition coil pack along with spark plugs and it still has this problem Mechanic's Assistant: Have you seen the misfire code before? Has the V...

Hi i have a cylinder 4 misfire code on my Vauxhall corsa and i have changed the ignition coil pack along with spark plugs and it still has this problem Mechanic's Assistant: Have you seen the misfire code before? Has the Vauxhall been stalling? No i havent it hasnt been stalling it runs just not very well with the misfire its down on power as a result Mechanic's Assistant: What year is your Corsa? 2010 Mechanic's Assistant: Are you fixing your Corsa yourself? What have you tried so far? Yeh i am ive swapped new ignition coil packs and spark plugs it made it better than what it was but the obd2 reader still says misfire in cylinder 4 Mechanic's Assistant: Anything else you want the Mechanic to know before I connect you? Not really

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Automotive Expert
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Hi john im having a problem with my vauxhall corsa its got a cylinder misfire in cylinder 4 i have already changed the ignition coil pack and spark plugs, the spark plug in cylinder 4 was quite black not oily however. It did make it a little better but the misfire is still there any suggestions?
Automotive Expert
have you checked compression?

I havent checked the compression in the cylinder
Automotive Expert
That would be the next step could be weak comoression from a internal issue causing the missfire

Ok what sort of issue could we be looking at potentially? I also have a new fuel rail with injectors im waiting to install
Automotive Expert
it could be the injector as well if you have a compression gauge its a quick easy test

Ive got one coming tomorrow which i can doWhats sort of internal issues could it be?
Automotive Expert
bad rings or a valve issue

Ok so quite bad then could a vacuum leak possibly cause this?
Automotive Expert
usually it will not effect only 1 cylinder

Thought so ok well ive checked the oil isnt milky and the exhaust smoke isnt white if the fuel pressure isnt right then there are a few different problems it could be correct?
Automotive Expert
correct

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