Intermittent Serious Hesitation on Acceleration - Ford Powerstroke Diesel Forum
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post #1 of 11 Old 01-04-2012, 04:25 PM Thread Starter
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Angry Intermittent Serious Hesitation on Acceleration

This is my problem...first off i have an 06 f350 6.0 with 35,000 on it.

Problem: After the truck has been driven for approx 20-30 min and is up to good operating temp it has random but severe hesitation. Most often this happens when starting from a stop but also sometimes when getting into the throttle after coasting for a bit. No matter how hard I push the throttle down the rpms slowly creep up to about 1100-1200 then once they reach that point the motors jumps to life, spools up, and completely takes off.

Can anyone offer any insight? The dealership says they cant reproduce the problem and I keep having the problem come back...Please help if you can! Thanks!


2006 F-350 FX4 sc/sb 6.0
4" turbo back MBRP no cat
Sinister EGR delete
Sinister coolant filter
SCT tunes by Mike @ Sinister
New oil cooler (5/2013 @ 50k)
Boss Plow
Hi-idle mod
Insight CS
Sound off 1400's
Rigid Duallys
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post #2 of 11 Old 01-04-2012, 04:29 PM
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Do you have a boost gauge? Sounds like the turbo could be sticking.


2008 ECLB FX4 all stock
Planning on: Spartan, full 5", EGR delete, 6"on 37's
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post #3 of 11 Old 01-04-2012, 04:31 PM Thread Starter
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I have no gauges other than stock. the dealer says they havent pulled any codes but i find that hard to believe


2006 F-350 FX4 sc/sb 6.0
4" turbo back MBRP no cat
Sinister EGR delete
Sinister coolant filter
SCT tunes by Mike @ Sinister
New oil cooler (5/2013 @ 50k)
Boss Plow
Hi-idle mod
Insight CS
Sound off 1400's
Rigid Duallys
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post #4 of 11 Old 01-04-2012, 05:34 PM
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I would check the egr valve. Mine was doing the exact same thing. It didn't throw a code at first then the next day it threw a p0404. I would pull the egr valve and clean it. For what its worth.. Mine had 43500 miles and it ended up being a blown EGR Cooler causing the EGR valve to gum up. It looked like a friggen death train coming down the road with all the white smoke!


2005 F250 XLT 4x4 6.0L
4" Lift, 315 Tires, Edge Insight CS w/ fuel pressure and EGT, Gearhead SRL+, Blue Spring, Sinister Coolant Filter, door seal mod, Hybrid Audio Imagines, JL 13TW5, JL 900/5, Dynamat, ect...ect..

Sinister (bulletproof style) EGR Cooler, Updated Ford Oil Cooler, ARP Studs, Updated EGR Valve, HPOP, and IPR by Underground Diesel Performance

Last edited by Guy_K; 01-04-2012 at 05:43 PM.
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post #5 of 11 Old 07-26-2012, 02:26 PM
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My truck is doing a very similar thing right now. It will be fine right off of idle to about 1000 rpm, then it'll hesitate (sounds different too, almost as if no fuel is being injected) then it'll be fine. It only lasts about a second or so. I not noticed any visible smoke, but I haven't been looking for it either. Is it the EGR valve? I just bought this truck a week ago....

2005 F350 XLT FX4. 2.5" leveling kit, 03 turbo, 4" MBRP Turbo-back, 58v FICM, SCT X4, Irate Diesel coolant filter
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post #6 of 11 Old 07-26-2012, 03:55 PM
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sounds like you probably need a new throttle pedal
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post #7 of 11 Old 07-26-2012, 05:33 PM
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Not sure if serious or trolling.

2005 F350 XLT FX4. 2.5" leveling kit, 03 turbo, 4" MBRP Turbo-back, 58v FICM, SCT X4, Irate Diesel coolant filter
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post #8 of 11 Old 07-26-2012, 06:39 PM
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I would bet with an 06 with that low of miles your turbo is prolly sticking! These trucks like to be ran hard pretty regularly!

2004 F250 CC SB
SCT Xcal2 SPD+ Lonney Wild Track
ARP Studs
PHP FICM Tuner
2003 Turbo
Coolant Filter
EGR Delete
4" Magnaflow
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post #9 of 11 Old 07-26-2012, 07:35 PM
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Guess I Will just start a new thread.

2005 F350 XLT FX4. 2.5" leveling kit, 03 turbo, 4" MBRP Turbo-back, 58v FICM, SCT X4, Irate Diesel coolant filter
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post #10 of 11 Old 07-26-2012, 09:34 PM
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I would bet money on a sticking unison ring
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