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On 4 Jun 2003 at 12:40, jim wrote: > I am trying to determine is my points, distributor or dwell meter might be having > problems. > > The points are set at .15" giving a dwell of 42 degrees. That seems counter-inutitive to > me because a smaller physical gap should have a greater angle of dwell, right? But maybe > the points are worn/bad. They are a few months old. It's actually hard to measure the real points gap because of the contour of the contact faces. They can pits and mounds which fit into one another so that you measure a much smaller gap than the actual effective gap. Unless you don't trust your dwell meter, just go by the dwell. That's the important thing. > If I push the accel. cable, the dwell drops to about 37. I know a large change indicates > the distributor (shaft) might need some help/rebuilding. The dwell does not alternate or > change at a consistent RPM, only when the RPM changes. It can be the breaker plate "bearing." put a small hose on the vacuum advance and just suck on it while you watch the dwell. Does the dwell change? If so, you need to replace the breaker plate. > The car drives fairly well. Although once it warms up, it can hestiate off idle and > won't accelerate unless it is first put into neutral. > > Thanks. I am trying to sort out what I see in the engine compartment during a tune-up > with what problems I notice while driving. Changes in the dwell translate into timing changes. Since these are unintended timing changes they are almost always undesirable. Getting the timing set right may help, but things won't ever be right until you get the dist timing advances both working right. What year are we talking about here? FI or carbs? -- Jim Adney jadney@vwtype3.org Madison, WI 53711-3054 USA ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org