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Message: [QUOTE="TD-5, post: 935316, member: 12311"] If the 10 psi measured at the delete regulator is the pressure being supplied to the internal transfer pump of the HPFP, is it possible this pressure is overwhelming the transfer pump inlet & causing the seal to leak, especially when everything is cold & tolerances are minimal? I have never seen a HPFP apart so I don't even know if the internal transfer pump is configured in such a way that it could cause the shaft seal to leak. But considering the regulator built into the factory secondary fuel bowl is set at 3psi +- 0.5psi to supply the HPFP, 10 psi to the HPFP might be to much. [/QUOTE]

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