[PeteF]

Today I used AAA for the first time in my life. The ProComp mechanical fuel pump that I installed about a year ago on my 351W gave up about two miles from my house. Upon disassembly, I found the diaphragm rod severely worn through about 95% of the way, then snapped in two. No other obvious signs of wear or misalignment to the engine, so the problem looks completely within the pump. I installed a new Holley pump, and we're on the road again. I read somewhere (maybe here) that ProComp products are made in China. I can't tell if this was a misassembly problem or just a poor design. It does look cheaply made, based on the internals, compared to other pumps I have seen in the past. Beware ProComp fuel pumps......this type failure gives no warning whatsoever. Fuel pressure gage reading zero made diagnosis easy though.