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>...As for exercising them. I imagine you could somehow rig an ecu, feed it > power and pressurized fluid to the injectors, and have something that > would oscillate the trigger contacts circuits. Am I on the right track > here? Or would it be simpler to oscillate an electrical signal at the > right voltage for the injectors while delivering pressurized liquid? > Someone with knowledge of simple electrical circuits could probably > design this easily and make it in a breadboard... The Grundig 1281 FI tester fires the injectors. Get one of those and use it for testing as well. http://www.icbm.org/erkson/ttt/engine/fuel_injection/VW1218%20tester%20instructions.htm Toby Erkson http://www.icbm.org/ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~