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7.3 Powerstroke 99-03 Powerstroke Discussion

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Old 08-01-2016, 09:28 PM   #1
MnGuy

Name: MnGuy
Title: Rookie
Status: Not Here
Join Date: Jan 2016
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Posts: 1
7.3 sputter BAD @ 3g

Started when I did injectors(238/100s)/studs/comp 910s/dual fuel. Hits 3g and it bucks bad, shakes the entire truck. Video shows it. Does it in all gears and all tunes even stock just not as bad. Runs good until that point. Fuel pressure was dropping about the same time so I finished hooking up the dual OEM pumps, now is rock solid at 65 psi but still bucks just as bad. Got a T500 and OEM CPS last year. ICP is OEM and a few months old. No boost fooler or anything like that. I'm stumped as to what it is and what to look at. I have the data log from that run and the rpm suddenly jumps to 3500 when the tach is steady ~3000 so there's something goofy going on. I'm going to data log with auto enginuity tomorrow for more accurate results vs using the torque app.

This is race tune and 100% throttle from when I rolled on to letting off.

https://www.youtube.com/watch?v=QNYIubFyK-8
 
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