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On 8 Sep 2002, at 8:29, matthew jones wrote: > Spot on Jim! > At speed it dropped back down to the battery voltage. > In 10 minutes I swapped a spare one in and the problem that had taked me a > good 20 hours was fixed. I was grinning like a loony on the test drive. Many > thanks ! Your grin, clearly visible from here, is all the thanks I need. Isn't it wonderful to find that a problem like this has a cheap simple solution. > I spotted that the wound wire hidden underneath the regulator had a small > break in it. I'm not sure if this is *the* fault. The misfire suddenly > appeared when we collected the car from a garage. They had done a small > amount of MIG welding on the car and I don't think they disconnected the > battery. Could that have killed the regulator ? That resistor eventually fails on all these regulators and this leads to the regulating points (inside) wearing down and changing the regulating voltage. This is the normal, and very common, failure mode. While anything is possible, I doubt if the welding had anything to do with creating the problem. For replacements, I have Bosch VRs which I have modified with a diode to make them last even longer than the originals. - ******************************* Jim Adney, jadney@vwtype3.org Madison, Wisconsin, USA ******************************* ------------------------------------------------ To unsubscribe, E-mail to: <type3-off@vwtype3.org> For more help, see http://vwtype3.org/list/