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Yup, I installed my dual fuel pump setup and I was not getting anything for psi...nuttin. I wired everything up correctly, even took the time to solder things into place instead of just using butt connectors. Couldn't figure it out. Finally my son comes outside and says, dad, I betcha one of them is running backwards...impossible I said...but just because I was running out of things to check, and it wouldn't be the first time he was right about something I was beating my head against the wall with, I figured I would pull them out one more time and test them on the bench. Go figure, one was producing pressure and the other was sucking it all back down into the tank. I verified the connections...again...and the tops of the fuel pumps are even marked "+" and "-". I switched polarity on the one running backwards and it was now producing pressure. Reassembled everything and sure enough, I had psi and the car started the first time. Sometimes when your knee deep in stuff, it's easy to miss the obvious things... Anyone ever had this problem with new Walbro pumps before??
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