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On 25 May 2001, at 13:16, Mark Healey wrote: > Yes but 'scopes and signal generators are massivly expensive. I could > buy dozens of rebuild pressure sensors from Bosch for the price. Given the right swap meet, you can buy the signal generator for $25 and the scope for $50-100. Of course if you have more money you can spend as much as you want. ;-) > I've often mused as to whether there is a market for a buisness that > with cubicles full of expensive test equipment that people could rent > by the hour. I've considered signing up for courses at a community > colege just so I would have access to the lab. I suspect a business like this would quickly go broke as the customers destroyed stuff faster than it could be replaced. A community college electronics course sounds like a good idea. > I tried it and the meter just isn't discrete enough. I found a 9V > transformer and hooked it to the windings that are hooked to the outer > contacts on the connector. I measured ~10.75V on the inner two > windings. When I hooked up the monkeyed one the measurement was also > ~10.75V. When I turned the ajusting screw 3 turns there was no > noticable movement on the meter. I think you need pretty expensive > equipment to ajust these. I think the hard part may be deciding exactly WHAT to measure. You put in a fixed primary voltage and measured the secondary voltage. You could also measure the primary or secondary current with a fixed load, or watch the waveform of any of these on a scope. I really don't know what is appropriate. > Anyway I put the virgin on in and now it dies when I let my foot off > the gas. I assume I can fix this just by tweaking on the idle > ajustment screw. Probably. I assume that you have everything else adjusted to spec, like the timing and fuel pressure. > This gives me another idea. How about ajusting the idle with the > virgin MPS in and then puting in the monkeyed one and ajusting it > until the idle matches. It seems logical. Maybe, as long as nothing else changes. You will need to do the swap quickly (no need to bolt it in place) so the engine temp doesn't change. Or it might be necessary to do this with a CO meter. - ******************************* Jim Adney, jadney@vwtype3.org Madison, Wisconsin, USA ******************************* ------------------------------------------------------------------- List info at http://www.vwtype3.org/list or mailto:help@vwtype3.org