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Power Strokes
7.3 Aftermarket
New sticks plus tunes, truck falls on it's face
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[QUOTE="maplemale, post: 1537461, member: 17366"] Preface by saying, I tested fuel pressure already, holds around 60psi WOT. Recently put new sticks in. Rebuilt myself with 30% over at Bitteroot Diesel (nice having family with a shop!). Also did a CNC Fab stage 1 HPOP, new transmission with tugger kit and billeted converter etc, rebuilt fuel system minus the pump (pressure reg, bowl, seals etc). Rebuilt IRP while I was at it. But, now we've got a new issue when accelerating hard and would like to ask my fellow 7.3 guys for some input. Does this seem like tuning, de-fueling? I didn't expect to need a new fuel pump with only 30% over, maybe I'm naive though. Description: Near WOT: Falls on in it's face half-way through curve usually around 2.2k RPMs . The IPR goes from 2500psi approx and instantly buries itself in a millisecond at 3800psi while truck dogs/lacks 75% of power. After maybe 2 seconds it snapps out of it / pulls hard and the IPR goes back to a 2800-3k psi and climbs to 3500psi, pulling hard / as normal. Only occurs at WOT or near WOT. Does NOT occur during medium / average acceleration. Most noticeable in 2nd - 3rd gear. My fuel pressure gauge holds fairly consistent during all this. This is FAR less noticeable in my street / all out tunes than daily driver. I've already reached out to Gear Head but wanted to see if I'm missing something obvious before I waste too much of their time. Seems like tuning, but maybe just plain lacking fuel. Odd how my Fuel pressure stays consistent around 60 psi during this. More odd to me is the way the IPR acts. PS: Did this right after new tunes and sticks. Put the new HPOP in as well and rebuilt IPR afterward, and made no difference. Still dogs at WOT for a couple of seconds. Thanks for input! [/QUOTE]
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7.3 Aftermarket
New sticks plus tunes, truck falls on it's face
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