C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

#2 plug carbonized

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Old Oct 22, 2001 | 10:01 PM
  #1  
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From: Fl
Default #2 plug carbonized

My '92 started missing Sunday evening. Had it at the shop today and the guy said the #2 spark plug was carbonized possibly with oil. He put in a new plug and checked the others. All else was ok.
And the significance of this would be???? Linda
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Old Oct 22, 2001 | 11:49 PM
  #2  
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Default Re: #2 plug carbonized (LT1)

you have a cylinder going down... so to speak.

the cylinder my have a bad valve seal, valve guide or even a ring collapsed.

it could be as simple as a bad injector flooding a bit too much fuel into that cylinder, too.

however, this could get expensive.


[Modified by bogus, 9:50 PM 10/22/2001]
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Old Oct 23, 2001 | 12:24 AM
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Default Re: #2 plug carbonized (LT1)

or it could just have been a bad plug. always start with the simple things first.
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Old Oct 23, 2001 | 03:45 PM
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Default Re: #2 plug carbonized (LT1)

How many miles since the plugs were changed? Dry carbon is usually fuel; wet oil. Pull it again after a couple hundred of miles and see what it looks like. Otherwise, do a balance test on the injectors and ask the mechanic if he checked the resistance of your plug wires.
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Old Oct 23, 2001 | 07:51 PM
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Default Re: #2 plug carbonized (SunCr)

18K miles on the plugs and wires. I'll keep a close eye on it.

Thanks everyone for your responses. I always know I'll get some input from you all when I have a question Linda
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