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Author Oh dear...
Paul_J
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Registered: 6th Jun 02
Location: London
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8th Feb 12 at 21:05   View User's Profile U2U Member Reply With Quote
Noticed a mis fire on the s2000...

Checked the plugs:



... I've never seen that happen to a plug... properly break off.


What's mostly worrying is after changing this it still mis fires
Nic Barnes
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Registered: 5th Apr 04
Location: nowhere near ginger people
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8th Feb 12 at 21:07   View User's Profile U2U Member Reply With Quote
valve not seating right since? iridium are they paul?
daymoon
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Registered: 1st Aug 08
Location: Selby, North Yorkshire
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8th Feb 12 at 21:07   View Garage View User's Profile U2U Member Reply With Quote
Happened to Faz few days ago
Adam-D
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Registered: 11th May 02
Location: Cheshire
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8th Feb 12 at 21:08   View User's Profile U2U Member Reply With Quote
compression test time.
Metta
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Registered: 29th Apr 11
Location: County Durham
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8th Feb 12 at 21:15   View User's Profile U2U Member Reply With Quote
Was it snapped when you took the plug out? Guesses are it's still in the Combustion chamber ut oh!.

Shine a torch down there see if you can see it if you can try center it and crank it over should spit it out be carfull tho.

And Compression test it as said above
smcGSI16V
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Registered: 26th May 03
Location: Farnborough Drives: Thurlby 888 CDTi No.98
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8th Feb 12 at 21:16   View User's Profile U2U Member Reply With Quote
vtec kick in.
Steve
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Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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8th Feb 12 at 21:20   View Garage View User's Profile U2U Member Reply With Quote
youve out driven your spark plugs with ur skillz m8
AK
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Registered: 5th Jul 00
Location: Aberdeen City
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8th Feb 12 at 21:27   View User's Profile U2U Member Reply With Quote
running lean?
Paul_J
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Location: London
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8th Feb 12 at 21:28   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by Nic Barnes
valve not seating right since? iridium are they paul?


Yeah they're iridium...
... never seen one break off like that. Seemed fine when I drove it last.

quote:
Originally posted by Metta
Was it snapped when you took the plug out? Guesses are it's still in the Combustion chamber ut oh!.

Shine a torch down there see if you can see it if you can try center it and crank it over should spit it out be carfull tho.

And Compression test it as said above


Yeah, it was snapped when I took the plug out. So why wouldn't it spit it out when I run the engine? You saying, take the plug over and crank it over?
Nic Barnes
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Registered: 5th Apr 04
Location: nowhere near ginger people
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8th Feb 12 at 21:32   View User's Profile U2U Member Reply With Quote
iriduims are known to do that. widely reported across the internet paul.
Adam-D
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Registered: 11th May 02
Location: Cheshire
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8th Feb 12 at 21:34   View User's Profile U2U Member Reply With Quote
random as it sounds, extendable magnet throu plug hole. see if it picks anything up?
AK
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Registered: 5th Jul 00
Location: Aberdeen City
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8th Feb 12 at 21:35   View User's Profile U2U Member Reply With Quote
dont start it if you havent already!
Paul_J
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8th Feb 12 at 21:35   View User's Profile U2U Member Reply With Quote
ok Adam, it's something worth trying - but I honestly don't get why that would cause a mis fire and why the bit wouldn't be blown out of the exhaust when I start the car?
AK
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Registered: 5th Jul 00
Location: Aberdeen City
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8th Feb 12 at 21:37   View User's Profile U2U Member Reply With Quote
wait - you are asking why its misfiring with 50% of the tip missing? Or have you popped a new plug in and turned it over?

I really dont recomment starting the car if you know there is a plug tip in a bore.
Paul_J
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8th Feb 12 at 21:37   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by AK
dont start it if you havent already!


Not only started it but revved it up to clear it out.

I basically started the car yesterday morning to go to work, noticed a mis fire - thought it was the choke... revved it up to clear it out a bit - no luck -

So if there is something in there, it's well and truly smashed the shit out of itself


Put a brand new set of plugs in it tonight and it still misfires.

[Edited on 08-02-2012 by Paul_J]
Warren G
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8th Feb 12 at 21:38   View User's Profile U2U Member Reply With Quote
it could get caught in the valve... it could indent into the piston

plug can burn out though heat, heat can be caused though lean combusion - high tempertures etc

need to do a compression test
AK
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Registered: 5th Jul 00
Location: Aberdeen City
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8th Feb 12 at 21:38   View User's Profile U2U Member Reply With Quote
min......

bore scope, leak-down test....
Jambo
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Registered: 8th Sep 01
Location: Maidenhead, Drives: VXR Arctic
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8th Feb 12 at 21:39   View User's Profile U2U Member Reply With Quote
Nic Barnes
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8th Feb 12 at 21:42   View User's Profile U2U Member Reply With Quote
what does other plugs look like?
Paul_J
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Registered: 6th Jun 02
Location: London
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8th Feb 12 at 21:50   View User's Profile U2U Member Reply With Quote
All other plugs looked fine.


Replaced em all anyway.
Warren G
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Registered: 14th May 06
Location: Kent
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8th Feb 12 at 21:54   View User's Profile U2U Member Reply With Quote
there not irdium

platuim tiped normal plugs

I use the same plugs but 6 grade in all the turbo cars i do...
AK
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Registered: 5th Jul 00
Location: Aberdeen City
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8th Feb 12 at 21:56   View User's Profile U2U Member Reply With Quote
you use a warmer plug in turbo cars?!?!
Nic Barnes
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8th Feb 12 at 21:58   View User's Profile U2U Member Reply With Quote
yeah id be on 7's or 8's on a turbo. i use 8s in mine
Paul_J
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Registered: 6th Jun 02
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8th Feb 12 at 21:58   View User's Profile U2U Member Reply With Quote
oh yeah haha... they're platinum that's what I meant.

I should know I just bought some new ones



[Edited on 08-02-2012 by Paul_J]
Warren G
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8th Feb 12 at 22:00   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by AK
you use a warmer plug in turbo cars?!?!


Astra VXR Standard rating plug is 6, same plugs as paul but 6 instead of 7

Use them upto stage 3, no issues, as do all the other tuners

and on 1.8 turbo's again no issues

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