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Jim Adney wrote: > I didn't want to be alarmist, but I've never heard the pump be loud just > >because the line wasn't primed: I HAVE heard that sound when there was a >problem with the pump. MY pump sounded like that when it's relief valve failed >a few months ago. > >I'm gonna have to get my pump rebuilding gear ready.... > > > It just occured to me what I was hearing (well, pulling the tank and visualizing it this weekend helped) I believe my fuel lines were full of air. When I was priming the system, the bubbles were coming out the return line into the tank. The air was being ejected into the return line into the tank rather forcefully, and echoing in the half full tank. Once the lines were all primed, the bubbles stopped. Now, here's the obvious question- how is air getting into the system if both ends of the fuel loop are submerged? I can see the lines losing pressure, but I would imagine they would always be wet. Or can I answer my own question by noticing that the #3 injector was leaching fuel out the hose- so if fuel can leave, air can go in also, right? What has me wondering further is that the same symptoms happened after the car had been shut for 4 hours- enough air had gotten in the lines to require 3 cycles of the pump to get it all out. Would this slight leaching be enough to get that much air in the lines. I guess I'll find out after I change out all the hoses. ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~