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Message: [QUOTE="Hotrodtractor, post: 56903, member: 25"] If it smooths out with the second regulator installed - it could be a "catch" in the movement of the big regulator - I would crack that puppy open and look for defects. I recently was working on a truck and installed a new fuel system - the damn thing wouldn't build pressure for nothing - no matter what I tried.... I ended up disassembling the regulator and found that it was "locked up" - cleaned up the parts - put it back together and it ran like a champ. This regulator had already been used on this same truck in the previous system it was running without any issues. [/QUOTE]

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