Lean or Rich

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03-22-2006, 07:34 PM

4drhondac

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Lean or Rich

Well I have a D16Y7 I have installed 20 over ZC pisons, I ran my engine about 2000 miles and then pulled my head off. The pistons and exhust valves are yellow....... I know this is not a good thing. How would I go about fixing this problem.

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03-22-2006, 07:38 PM

Civicse

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Re: Lean or Rich (4drhondac)

what do the spark plugs look like? might be running to hot, lean mix

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03-22-2006, 07:49 PM

4drhondac

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Re: Lean or Rich (Civicse)

Same as the pisons look it was not just yellow spots or nothin It was a bright yellowcovering the whole piston and valves

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03-22-2006, 07:54 PM

Civicse

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Re: Lean or Rich (4drhondac)

well yellow on spark plugs means high speed glazing. try using a colder spark plug. i'm not sure though if that would also cause the pistons to have yellow deposits

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