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I had an 03 that would run the same tune (rear wheel hp) level as my 08. So that's the same basic fuel flow needs, but the 08 would fall on its face about 60% of the time, more so when hot. Made no sense. Found the engine side fuel hose by the drivers side rear valve cover flex line kinked. Cut it out per the TSB and installed the new fuel hose and hose clamps. Drove it, took a few minutes of WOT to purge the air. Stopped and bled fuel filter again, then drove again. All issues resolved in my 08 now. I am surprised what power I picked up. Less surging up top RPM as well. Was ready to install a lift pump, no longer needed now. Truck is quieter as well.
 
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