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We recently replaced the original fuel pump on my 2005 Rans S7S during the five year rubber replacement.  Never had any trouble with the old pump, but with the new one (which has a fuel overflow line) the fuel pressure fluctuates.  Most notably, when climbing out at full power the indicated fuel pressure drops to just over 2psi (unless i turn on the electric aux pump).  When i level out at cruise with reduced power, the pressures comes up to 4 to 4.5.

Has anyone else had problems with the new model pump?

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