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Jim Adney wrote: > I've got piles of old yellow and black injectors, but I need to put > together a > test setup to check them for leaks and to exercise them. I'm sure that most of > them are probably fine, now that I've started storing them in kerosene. > > I actually made a leak tester for my injectors. Essentially I made a "tank" made of 4" PVC pipe (has a volume of maybe 20 oz), a 5/16 hose barb, a pressure gauge, and a quick disconnect for my compressor. I fill up the "tank" about halfway with kerosene and I put the injector on a hose. I pressurize the "system" to 30 lbs by setting the compressor regulator to this. I leave the injector in a mason jar and see if it leaks after a few hours. Remember the leaky injector that would not cure itself? It leaked under this method. The injector I replaced it with I tested in this manner, and no leaks, and no leaks in the car. This was an injector that had been stored dry, so I was a bit leery before using it, hence the test. 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. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~