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Message: [QUOTE="Jonnydime, post: 1540380, member: 7107"] I have been having a rail pressure surge problem pretty much the entire time I have owned my Harley truck. It was most prevalent when the truck had a cp3 dual fueler and got substantially better with a duel k16 kit. It was still there but I just attributed it to the fact that I had ported fuel rails as well. Well over the past few weeks while the trans was out for converter work I swapped in some stock rails hoping that would solve the problem completely. I guessed wrong. So I’m down to the hpfp’s or the injectors. What is a solid way of isolating the hpfp’s so I can check if one of them is causing this issue and the other pump is masking the problem? I can’t easily remove the front pump since my atmospheric turbo is mounted to it. Will removing the belt let me run the truck long enough to check things out? [/QUOTE]

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