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> From: Jim Adney > > Earlier, I wrote: > > > When both points are closed, all 3 wires are commoned > > together by the points inside the distributor. > > With a properly functioning set of trigger points, both > contacts are never closed at the same time. Ah, that's where my assumption fails, then! I must have a close look at the cam in the dizzy some time. I suppose it doesn't need to have a very sharp profile or short duration. I just had a mental picture of a valve cam shape. Its only the timing of the opening which is important, and even that doesn't need to be nearly as accurate as the ignition points. > On 28 Oct 2005 at 10:06, Russ Wolfe wrote: > > > I want to also add one thing about the trigger points > > that most people don't think about. The trigger points > > opening and closing are what keeps the fuel pump running. > > Each time one or other of the points closes, the pump > > runs for it's "1 second". Interesting. Thanks. -- Matt. UK. '73 1600e FB. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~