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> >This system has the very common problem that it develops air leaks > >into the crankcase (most important are the pushrod tube seals) which > >make the engine run lean. This is usually treated by those who don't > >understand the problem by removing the sealed factory calibration > >plug and attempting to readjust the mixture, a procedure that never > >works. > > Uhm, not quite sure if you are referring to the L-jet system, but the plug > that it sounds like you are describing is the CO2 screw on the air meter. > Yes, there is NO need to mess with it. Same goes for the fuel pressure > can. Yes, that's the one. As I recall, it actually is adjusting the richness at idle, but it has an effect at all throttle positions. It is used to adjust the richness until the CO meets spec. Agreed that you should not be tempted to mess with it. Jim - ******************************* Jim Adney, jadney@vwtype3.org Madison, Wisconsin, USA *******************************