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Sparkplug carbonized and poor acceleration
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Stratoblaster
New User
Dec 23, 2009, 6:39 PM
Post #1 of 2
(1954 views)
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Sparkplug carbonized and poor acceleration
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1992
Yukon GMC
350 V8
180000
Sparkplug from # 4 Cylinder is carbonized and truck requires a little more gas to smooth out the roughness at low speed. Highway traveling seems to be pretty smooth but in city driving it appears to be a little rough.
Question: Does this seem like it may be a bad valve or bad pistion ring (are these the same thing )that can only be corrected by having the engine pulled ?
Is there any other way to correct this or minimize this beside replacing the spark plug in # 4 cylinder often ?
Will I be damaging the car anymore by driving it without correcting the problem ?
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steve01832
Veteran
Dec 23, 2009, 7:33 PM
Post #2 of 2
(1944 views)
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Re: Sparkplug carbonized and poor acceleration
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Sounds like you may have carbon deposits built up in the cylinders. Have a shop perform a top engine clean to remove the carbon. You will have to call around to find a shop that has the setup to do this.
Steve
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