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Author Topic: slight missfire  (Read 2459 times)

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msb1973

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slight missfire
« on: 05 December 2010, 10:19:34 »
picked up the partners new car yesterday a 2000plate 2.5 cdx and i have noticed a slight missfire under load, drive it gently its ok anything more it feels like its on 5 cylinders, i spoke to the previous owner who had it 2 ish years and he never recalls it having plugs changed, would it be a safe to assume that its most likely the plugs are knackered?
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tunnie

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Re: slight missfire
« Reply #1 on: 05 December 2010, 10:20:31 »
Plugs, or cam cover gaskets have gone and the plugs are full of oil! Wip out the plugs, at £1.50 each they are cheap as chips  :y
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millwall

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Re: slight missfire
« Reply #2 on: 05 December 2010, 10:23:04 »
had the same on mine it turned out the leads on passenger side were arcing  new leads and now running spot on  have a look at leads at night with engine running see if you can see it arcing :y
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msb1973

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Re: slight missfire
« Reply #3 on: 05 December 2010, 14:49:42 »
cheers guys, hopefully a set of plugs will cure its in at the garage tues to be sorted :y
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Field Marshal Dr. Opti

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Re: slight missfire
« Reply #4 on: 05 December 2010, 16:46:51 »
Quote
Plugs, or cam cover gaskets have gone and the plugs are full of oil! Wip out the plugs, at £1.50 each they are cheap as chips  :y


EXACTLY.... my problem... Mr Tunnie....pedal trick revealed 0...3..0....0 and 0..3..0...5 codes

Plug 5 full of oil..... :'( :'(
« Last Edit: 05 December 2010, 16:48:34 by optimist »
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msb1973

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Re: slight missfire
« Reply #5 on: 07 December 2010, 17:09:23 »
looks like you guys were right about the camcover gaskets 2 out of 3 plug holes on each side have oil in so new cover gaskets are on the way :'(
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djac

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Re: slight missfire
« Reply #6 on: 07 December 2010, 17:19:23 »
And clean the breather system or it will happen again...  :y
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msb1973

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Re: slight missfire
« Reply #7 on: 07 December 2010, 17:36:05 »
yeah my mechanic guy said that he will clean the breathers, replace gaskets, replace plugs, replace the knackered battery and do a coolant change as the coolant when tested was only providing protection down to -5 to -10 which isnt anywhere near enough in  the present conditions :o, cost £300 all in
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RobG

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Re: slight missfire
« Reply #8 on: 07 December 2010, 17:39:11 »
Quote
yeah my mechanic guy said that he will clean the breathers, replace gaskets, replace plugs, replace the knackered battery and do a coolant change as the coolant when tested was only providing protection down to -5 to -10 which isnt anywhere near enough in  the present conditions :o, cost £300 all in
Genuine, or you`ll be wasting your money. Don`t forget the "O" rings as well :y
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msb1973

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Re: slight missfire
« Reply #9 on: 07 December 2010, 17:44:51 »
garage gave me a price i agreed so will leave em to it if it leaks again i the future thet will have to sort it, but having said that he is my trusted guy who does work on all my cars including my last car a track prepped m3 so he knows i want it right
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msb1973

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Re: slight missfire
« Reply #10 on: 10 December 2010, 21:08:47 »
whoo hoo she's back on six, new plugs, new cam cover gaskets, and all breathers cleaned= one happy person indeed ;D
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feeutfo

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Re: slight missfire
« Reply #11 on: 10 December 2010, 23:25:29 »
Still ask them what was done with cam seals. Pattern seal, bathroom sealant, instant gasket will all give trouble and further bills in future. You need to know.
« Last Edit: 10 December 2010, 23:25:59 by chrisgixer »
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msb1973

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Re: slight missfire
« Reply #12 on: 11 December 2010, 08:37:55 »
genuine seals as far as i'm aware, no sealants, silicone etc used as i was told this can lead to more problems than its worth :y
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millwall

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Re: slight missfire
« Reply #13 on: 11 December 2010, 10:31:04 »
Quote
genuine seals as far as i'm aware, no sealants, silicone etc used as i was told this can lead to more problems than its worth :y
needs sealant
Sealent, Black (not the Green stuff!): 90485251, 1 off  as per maintenance guide on here :y
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msb1973

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Re: slight missfire
« Reply #14 on: 15 December 2010, 06:15:56 »
Bloody things run for a couple of days then the missfires back, no fault codes, definatley confused now, suspect it may be coilpack or leads,is this a fair assumption? :(
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