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Keep Fouling Plug....Need your thoughts

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5.0L (1979-1995) Mustang Technical discussions on 5.0 Liter Mustangs within. This does not include the 5.0 from the 2011 Mustang GT. That information is in the 2005-1011 section.

Keep Fouling Plug....Need your thoughts

Old 05-30-2006, 09:51 PM
  #11  
Twisted
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Default RE: Keep Fouling Plug....Need your thoughts

Good charts, Grim. No doubt...it's oil.
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Old 05-30-2006, 09:53 PM
  #12  
Grimace5.0
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Default RE: Keep Fouling Plug....Need your thoughts

Thanks!

Actually fuel additives can make the plug look like that too.........
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Old 05-30-2006, 09:58 PM
  #13  
FiveLiterRiceEater
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Default RE: Keep Fouling Plug....Need your thoughts

i'll show you some pics soon of what a broken piston ring will do to a plug.

one of my plugs fouls so bad, sometimes the electrodes will bridge together with carbon.
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Old 05-30-2006, 10:25 PM
  #14  
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Default RE: Keep Fouling Plug....Need your thoughts

that is not low...ford allows 115-120....remember ford made these motors loose....

i'd point out this....worn valve guides do this..leaking injectors also do this..
ORIGINAL: AdderMk2

140-145 is LOW compression.. my 1991 Probe GT runs 145 psi and its compression ratio is 7.8:1

you have motor problems bro
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Old 05-31-2006, 02:05 AM
  #15  
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Default RE: Keep Fouling Plug....Need your thoughts


ORIGINAL: Grimace5.0

Thanks!

Actually fuel additives can make the plug look like that too.........
I'm betting its oil. He says he gets blue smoke out of one side, and burns like fo-five quarts in a thousand miles.
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Old 05-31-2006, 12:53 PM
  #16  
50Trippin
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Default RE: Keep Fouling Plug....Need your thoughts


ORIGINAL: Grimace5.0

Have a look at these pics... I'd say it's #1..ash deposits.

http://www.fizzer-redline.com/plugs.htm

Just out of curiuosity, are you running any fuel additives?
no additives. run shell premium that's it...
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Old 05-31-2006, 01:54 PM
  #17  
Frebius
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Default RE: Keep Fouling Plug....Need your thoughts

I was wondering since my compression tested at about 125 on my 95 Cobra last night.


ORIGINAL: grabbem88

that is not low...ford allows 115-120....remember ford made these motors loose....

i'd point out this....worn valve guides do this..leaking injectors also do this..
ORIGINAL: AdderMk2

140-145 is LOW compression.. my 1991 Probe GT runs 145 psi and its compression ratio is 7.8:1

you have motor problems bro
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Old 05-31-2006, 04:36 PM
  #18  
sc94gt
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Default RE: Keep Fouling Plug....Need your thoughts

I don't know if anyone mentioned this or not, but what about a bad injector?
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Old 05-31-2006, 04:42 PM
  #19  
Twisted
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ORIGINAL: sc94gt

I don't know if anyone mentioned this or not, but what about a bad injector?
Oil injector?
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