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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 --------------------------------------------------------------------- Melissa Kepner Jim Adney Laura Kepner-Adney jadney@vwtype3.org Madison, Wisconsin ---------------------------------------------------------------------