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Old 07-03-2006, 03:25 PM   #1
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engine questions. need some help

I am helping diagnos my future mother-in-laws car. She did not pass emissions testing and after putting it on a scope, she was told the valves have carbon buildup on them and they will need to be replaced to pass emissions at a fee of 900 bucks.

does anyone know what causes the carbon build-up? and a easier cheaper way to fix it then replacing the valves.

i thought it would be from running too rich, not changing oil properly, or too low quality gas.

any thoughts? thanks all
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Old 07-03-2006, 03:30 PM   #2
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Re: engine questions. need some help

Carbon builds up from incomplete combustion usually from lack of tune ups, clogged injectors or oil getting past the rings.
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Old 07-03-2006, 04:33 PM   #3
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Re: engine questions. need some help

run a can of seafoam through it, i have a writeup on it in the
"how to" sectrion it will clear alot of the carbon buildup out
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Old 07-03-2006, 04:59 PM   #4
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Re: engine questions. need some help

how often are you supposed to do tune ups? Also, would seafoam be a smart idea for a 2002? Just to trying to get the engine to where it should be.
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Old 07-03-2006, 06:26 PM   #5
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Re: engine questions. need some help

Quote:
Originally Posted by jimmy_beaner View Post
how often are you supposed to do tune ups? Also, would seafoam be a smart idea for a 2002? Just to trying to get the engine to where it should be.
I do a tune up every year. This lets me see how everything is like sparkplugs which I change every year.

Seafoam is great for cleaning out the Intakes after the PCV valve allows oil to get past it and gets the intakes grungy
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