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On 14 Aug 98, at 9:29, DILLARDP@edu-suu-lifac.li.suu.edu wrote: > The '71, with dual Weber ICT-34s and Pertronix ignition, idles well, runs > smoothly, has lotsa power...until I have driven about 10 miles (the > distance I must go to get from home to town each day). When I have come > up on the 8 or 9 mile mark (running between 55 and 65), the engine starts > missing quite badly. After I let the vehicle sit and cool at the > restaurant (my morning ritual is an hour's worth of coffee drinking and > newpaper reading), it does fine...until I do the return trip home, then, > shazam, same problem under the same circumstances. Because of the low lead content of today's gas, I think this is a long shot, but what about fouled spark plugs? If your engine is running too rich or if you are using spark plugs with too cool a heat range, you can get deposits of lead compounds on the part of the spark plug insulator exposed to the combustion chamber. When these deposits are cool then are insulating, but as they approach operating temp they become conducting. Normally these deposits clean off when the insulator reaches the "self cleaning temp" but if things are running a bit too cool, they will accumulate to the point that they can just allow the spark to drain off quietly. I stress that this is a long shot, but it is easy to test with a fresh set of plugs. If this started just after you switched to a special set of HP cool plugs, try something closer to the normal heat range for this test. Jim - ******************************* Jim Adney, jadney@vwtype3.org Madison, Wisconsin, USA ******************************* ------------------------------------------------------------------- List info at http://www.vwtype3.org/list or mailto:help@vwtype3.org