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On 30 May 2005 at 19:39, Elroyyy@aol.com wrote: > >Only the 68-9 TVS makes an audible click. The later ones are all silent. > > I don't like the way this makes me feel, but I have to disagree with you, Jim. > I don't claim that this is where it should be adjusted, however; with the key > ON and the TVS connected to its MPC, turning the TVS Counter-CW produces an > audible click every time. The clicks you're hearing are the injectors firing as other contacts are made in the TVS. The late switch itself makes no noise, but the early switch actually contains an ordinary microswitch which makes a click, key ON or OFF. The clicks made by the injectors are NOT something that you should be using to set the TVS position; for 70-73 you have to use either the FI tester or an Ohmmeter. > It occurs at the 10 deg (5 ticks counting from the rear of the car) mark. > > The "questionable" TVS that I have will click at the same point but will only > do it once. In order to get it to click again, the key must be turned OFF and > then ON again. That's weird, but it probably means that someone has messed with some of the contacts inside that switch. I see that fairly often. You can open up the switch and look inside. Look especially for 2 little gold contact wires which should each touch a gold post when there is torque on the shaft in one direction or the other. > >For the 72-3 TVS with 5 pins: > >With the throttle at idle, loosen the fixing screws for the TVS. Attach the > >Ohmmeter to pins 17 & 12(47). The numbers are molded into the plastic, but > >these are the 2nd and 3rd pins up from the bottom. > >Adjust the position of the TVS so that the contact just goes open each time > you > >let the throttle back down to idle. > > Is this the same thing? > Loosen the TVS and connect the Ohmmeter as described. > Turn the TVS Counter-CW (as if the throttle were returning to idle) until the > needle on the meter moves. Maybe, but as I was looking inside a TVS the other day, it looked like there might be a difference. Since you're there with everything connected, you should be able to do it both ways and see if both get you to the same place. The reason they should be different is because of the gold wires and their sensitivity to direction of motion. In the end, however, the ohmmeter should read infinity in the idle position. Let me know. I'm a little confused about this, too. -- ******************************* Jim Adney, jadney@vwtype3.org Madison, Wisconsin, USA ******************************* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~