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Author Ka missfire.
harrisp
Member
Registered: 15th Dec 07
Location: Derbyshire
User status: Offline
27th Oct 08 at 11:34   View User's Profile U2U Member Reply With Quote
I know its a corsa forum but never mind.

My girlfriends ka had a intermittant missfire on cylinder number two, i changed the spark plugs and it was fine for ages then it started again so I changed coilpack, ht leads and spark plugs and it was fine for three days and now it it missing really bad.
She was doing 70 on the motorway and it dropped down to 40 because it wouldn't pull.
It is also making a really loud noise as if there is no oil in it.
If i pull a ht lead off a spark plug in 1,3,4 (one at a time) the engine idles really low as if its about to die but if I unplug number 2 there no change.

Any help appreciated.
Torsa g
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Registered: 20th Sep 07
Location: Tamworth. Rides: An OSTRIDGE
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27th Oct 08 at 11:39   View User's Profile U2U Member Reply With Quote
Mite be head gasket faliure
harrisp
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Registered: 15th Dec 07
Location: Derbyshire
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27th Oct 08 at 11:47   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by Torsa g
Mite be head gasket faliure


Whats best way to test for that?
Torsa g
Member
Registered: 20th Sep 07
Location: Tamworth. Rides: An OSTRIDGE
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27th Oct 08 at 11:50   View User's Profile U2U Member Reply With Quote
compression test,
harrisp
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Registered: 15th Dec 07
Location: Derbyshire
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27th Oct 08 at 12:00   View User's Profile U2U Member Reply With Quote
How much will that cost?
Torsa g
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Registered: 20th Sep 07
Location: Tamworth. Rides: An OSTRIDGE
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27th Oct 08 at 12:01   View User's Profile U2U Member Reply With Quote
you can buy them from a decent auto store, for about 15 quid and do it yourself
deano87
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Registered: 21st Oct 06
Location: Bedfordshire Drives: Ford Fiesta
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27th Oct 08 at 12:18   View User's Profile U2U Member Reply With Quote
Check for the tell-tale signs like oil in the water, mayo/whipped cream under the oil filler cap and no hot air coming through heater vents when engine warm.
harrisp
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Registered: 15th Dec 07
Location: Derbyshire
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27th Oct 08 at 12:54   View User's Profile U2U Member Reply With Quote
Well ive just checked the spark plugs and one was melted, put a new in and it runs better, but if I take the lead off that plug it doesn't effect how the engine runs, also if I take it off then the lead sparks to any metal with visual spark but the other leads don't.

Missus says she only gets warm air now and not hot air.
S77 CKL
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Registered: 16th Aug 08
Location: North-East
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27th Oct 08 at 13:40   View User's Profile U2U Member Reply With Quote
Poss headgasket then.
harrisp
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Registered: 15th Dec 07
Location: Derbyshire
User status: Offline
27th Oct 08 at 13:45   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by S77 CKL
Poss headgasket then.



Going to get it pressure tested in a bit.


Thanks everyone.
modded_corsa
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Registered: 9th May 03
Location: Middlesbrough
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27th Oct 08 at 19:07   View User's Profile U2U Member Reply With Quote
these engines suffer from broken valve springs, hence the noise
S77 CKL
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Registered: 16th Aug 08
Location: North-East
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28th Oct 08 at 11:58   View User's Profile U2U Member Reply With Quote
There arent bad engine when working like all but they do suffer problems. Common for eating coils to like you have already found out.
harrisp
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Registered: 15th Dec 07
Location: Derbyshire
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28th Oct 08 at 16:30   View User's Profile U2U Member Reply With Quote
Had the head off today, number two piston has a huge chunk missing, can see the piston ring and down the bore, it has also knackered the bore so new engine time.
Torsa g
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Registered: 20th Sep 07
Location: Tamworth. Rides: An OSTRIDGE
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28th Oct 08 at 16:32   View User's Profile U2U Member Reply With Quote
thats unlucky beans, has it damaged the head at all
harrisp
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Registered: 15th Dec 07
Location: Derbyshire
User status: Offline
28th Oct 08 at 17:36   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by Torsa g
thats unlucky beans, has it damaged the head at all


Bits of piston have melted to the valves,

Just found out she was doing a bit more than 70 (on her private road) when it went pop.

 
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