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On Thu, 2004-06-24 at 22:22, Mark Healey wrote: > >> > >Are you sure you have the right cap and rotor combination. Not a tall > >T-1 cap and a short T-3 rotor?? > > Yes. > > >How is the carbon brush in the center of the cap?? Is free to move and > >make contact with the rotor? > >Is the rotor resistance about 5000 ohms? Is the total plug wire > >resistance from cap to plug about 1500 ohms? > > I metered the wires and as far as I can tell without a megger they are > wide open. I guess I'll have to get new wires. Now, why 1500 ohms. > If they are wires shouldn't they be 0? The original wires were copper cored, with a resistor suppressor built into the brown plastic connector at the spark plug. Without the connector screwed onto the wire, the wire should show no resistance. The total resistance (wire and connector) should be 1000-1500 ohms. > > The nature of the failure of some of these components confuses me as > well. The coil is really just a transformer. Right? How does it > degrade. I figure that the windings would be OK or not. In my 40 years of working one VW's I don't think I have ever seen a bad Bosch coil. But in the 35 years or so that your car has been around, It is hard to say what has previously been changed to non-stock parts. > > The same with the rotor resistor. Mine was about 40K but not open. > How does that happen? This may be your problem, if it is 40K ohms. It sounds like you may be reading a carbon track in the rotor where the suppressor resistor has failed. It should read about 4000-5000 ohms. -- Russ Wolfe '71 FB AT '66 FB MT '65 T1 (not running) russw@classicvw.org http://www.classicvw.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org