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On 30 Oct 97, Steve Bradley wrote:
> Can anybody tell me what is special about cylinders 2 and 4 in a '71
> FI SB?
>
> When I pull my plugs, the electrodes on the ones on cylinders 1 and
> 3 are brown (which is normal, I assume) and the area directly
> adjacent to the thread, facing the combustion chamber is fluffy
> black (not normal, I assume).
>
> The plugs on cylinders 2 and 4 are totally carbon fouled, fluffy
> black on every part of the plug exposed to the combustion chamber.
>
> Does the CU or some other component send more gas to cylinders 2 and
> 4 for some reason?
There should be nothing special about 2 and 4. This is pretty
strange. The 71s are just about the best year.
Things to try/consider:
Check your compression all around.
Check your charging system voltage.
Check the timing and the valve adjustment.
How's your gas mileage?
Jim
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Melissa Kepner Jim Adney
Laura Kepner-Adney
jadney@vwtype3.org
Madison, Wisconsin
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