Tom26
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Registered: 11th Feb 11
Location: Crewe
User status: Offline
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Hi my x16xe has developed a misfire.It idles ok a little rougher than usual (sounds slightly subaru ish) but when accelerating theres nothing just flat.It was fine then i filled the tank with fuel and the next morning it was missing.I dont think this is the cause but ive checked the plugs and leads just want some ideas on what to check.Any help or advice would be great.Thanks
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marklawton
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Registered: 24th Apr 05
Location: Pensby, Wirral Drives:Golf mk4 GTI
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coilpack?
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*CorsaCal*
Member
Registered: 3rd Oct 10
Location: Leicestershire Drives: 20XE Corsa
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On my x14xe i had a slght missfire at idle and a really bad missfire under load/acceleration. I did have white smoke out the exhaust aswell though On mine it turned out to be the headgasket had failed in cyl4. I could see by removing the sparkplugs and looking down the plug hole with a tortch/camera i could see pistons 1-3 where black and piston 4 was shiny (see my project thread) also spark plug number 4 looked cleaner than the rest.
You have definataly put the right fuel in didnt you?
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Tom26
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Registered: 11th Feb 11
Location: Crewe
User status: Offline
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If the headgasket had gone surely it would use water and have mayo under cap?
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tom_ow
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Registered: 9th Jul 06
Location: Charsfield, Suffolk
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no mine started missfiring at idle and still ok under acceleration and two days later boom hg gone
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*CorsaCal*
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Registered: 3rd Oct 10
Location: Leicestershire Drives: 20XE Corsa
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Well yes it would be loosing water if coolant was getting into the cylinder as in my case but yours could have gone between two cylinders for example. Im not saying thats definataly what it is so dont go just ripping the head off cuz its a pig! Do a compression or cylinder leak test if possible.
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*CorsaCal*
Member
Registered: 3rd Oct 10
Location: Leicestershire Drives: 20XE Corsa
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have you had all 4 plugs out and looked at them? ive seen it before where the white insulation bit has a crack in it causing a missfire too.
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Tom26
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Registered: 11th Feb 11
Location: Crewe
User status: Offline
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I did a compression today (forgot to remove fuel pump relay) and 1,2 cyclinders read 90 and 3-4 where around 220.Still no water lost and no mayo under cap.Any ideas?
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Anthony
Member
Registered: 2nd Nov 06
Location: milton keynes. Drives: 1.6 Sport
User status: Offline
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thats a massive difference, sure the gasket has gone.
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*CorsaCal*
Member
Registered: 3rd Oct 10
Location: Leicestershire Drives: 20XE Corsa
User status: Offline
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If them figures are correct id say headgasket has failed between cy1-2, to be honest that might even need skimming. You would only loose coolant if it failed between a cylinder and a coolant passage and you would only have mayo if it failed between a oil and coolant passage. Them figures surgest to me that its failed between the two cylinders?
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corsadonk
Premium Member
Registered: 4th Jul 09
Location: Marlborough, Wiltshire
User status: Offline
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When it's running, move your hand arond the leads on the coil pack, if you get a faint shock, it will be aching out it's self. Or do it in the dark, and should be able the see the sparks.
If that is the case, switch it off, remove the leads one by one, and give them a good soak in WD40. Should cure it.
My old Sport did it a few times, when it was wet out.
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