johnscorsaXE
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Registered: 14th Sep 04
Location: Walsall
User status: Offline
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basically cutting a long story short, this is whats happened to my spark plugs.
car was running rough and misfiring in the low rev range
gave the car a service, changed plugs etc and the problem dissaeared.
the other day the car started running rough again. took plugs out, which were new one month ago. and 2 of them were destroyed. unsure of which cylinders, but most likely 1 and 4
the inside of the spark plugs were melted. 2 of them were fine however.
im guessing this has been caused by over fuelling, which would also explain my poor fuel consumption.
anyone got any other ideas?
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johnscorsaXE
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Registered: 14th Sep 04
Location: Walsall
User status: Offline
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anyone of you techie guys have an idea?
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Warren G
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Registered: 14th May 06
Location: Kent
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pics of the plugs......
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johnscorsaXE
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Registered: 14th Sep 04
Location: Walsall
User status: Offline
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apologies about quality of pic. couldntfind my camera so used my fone instead.
first 2 pics show the most damaged one
2nd two pics show the one
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johnscorsaXE
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Registered: 14th Sep 04
Location: Walsall
User status: Offline
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in the first two pics can you see how the white centre and electrode have been totally melted. melted into the plug about 4mm down
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BeArDy
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Registered: 7th Aug 00
Location: Manchester
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What engine and car
What plug model and make
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johnscorsaXE
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Registered: 14th Sep 04
Location: Walsall
User status: Offline
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its a astra mk3 x14xe
it happened about a motnh ago, then i put these bosch super 4 plugs in, after a month it started misfiring again, i took the plugs out this morning and foud them destroyed (2 of them)
so i bought some new plugs this morn and they misfiring had gone, obviously
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jamesvalver
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Registered: 21st Feb 03
Location: Bury St Edmunds, Suffolk
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hmmm... i would get the plugs out and look down the hole to c the condition of the pistons. ive seen where melted plugs have burnt through pistons before
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Dave A
USER UNDER INVESTIGATION - DO NOT TRADE
Registered: 10th Dec 03
Location: County Durham
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destroyed plugs is usually running lean rather than rich. the engine will run a lot hotter running lean.
I would say its worthwile taking the head off to see if any other damage has been caused by all the bits flying round the combustion chamber.
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Rob_Lee
Banned
Registered: 9th Dec 05
Location: Folkestone Drives: Nova 1.6 16v
User status: Offline
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A plug melted on my old nova. Turned out it broke a piece off a valve when a piece of the plug got jammed in it.
Get the head off
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johnscorsaXE
Member
Registered: 14th Sep 04
Location: Walsall
User status: Offline
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well ive put new plugs in for now and the car is running fine. so i dont think theres any bits in the head.
even if i did tae the head off, and everything seemed fine. what would my next step be?
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Dave A
USER UNDER INVESTIGATION - DO NOT TRADE
Registered: 10th Dec 03
Location: County Durham
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I would be taking the head off anyway just incase. if there is a loose bit bouncing round than it could easily jam under a valve and cause serious problems.
if you want a proper diagnosis get it to a rolling road so they can check for pinking / detonation and check the a/f ratio using a wideband lambda.
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johnscorsaXE
Member
Registered: 14th Sep 04
Location: Walsall
User status: Offline
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could u just explain what pinking is please.
are there any decent roolin roads in coventry or nearby?
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