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Message: [QUOTE="78f100, post: 1387672, member: 3542"] I had similar issue once, make absolutely sure you don't have a slight leak some where. Mine ended up being a fuel rail. Truck would not maintain full rp at wot. Had a newer pump and injectors, so i swapped injectors out (new lines also) with a set of known good ones, same issue. I ended up pulling the valve covers and ran the fuel pressure test on ids. When it commanded fp above 15000 i started getting a fuel mist off cyl 6 rail right behind where the line attaches. So i thought it was the line, put another new one on same thing. I swapped the rails, fixing the problem. I swear somehow that rail was cracked, they were ported rails so not sure if it happened during the porting process or what. It never really put enough fuel in the oil to tell either, it only seemed to leak under really high pressure. If you do it like that be very careful as I'm sure you know that much fp is dangerous. Hope you figure it out. [/QUOTE]

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