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> > Just got back from a trip and drove my 71 FI Fastback yesterday for > > the first time in a couple weeks. It seems to be having an odd > > problem. Whenever I'm at speeds above about 30mph, every > 10-15 seconds > > it does this thing where it feels like the engine is missing really > > bad or something, acceleration suddenly stops and it makes > this weird > > vibration that's like when the engine is lugging from being > in too low > > of a gear (but it's not lugging at all, engine is usually between > > 2500-3500 rpm when it does it) When I set my idle speed wrong or when the operating temp was not reached when I set it, I get this problem. It will go high and low and occassionally die on the low end. Once I reset the idle speed properly it runs fine. There seems to be a certain idle speed around 925rpm that my car does not like also and it will do this same thing. Its worth checking out, however I have never experienced your particular problem while at cruising speeds, only at idle. Jason Smith 71 Square FI AT Columbus, OH USA http://jasontsmith.tripod.com/vw.htm ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org