boost drop off at WOT? - Ford Powerstroke Diesel Forum
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post #1 of 27 Old 03-20-2012, 08:58 PM Thread Starter
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boost drop off at WOT?

so i went out for my bi-weekly "cane on my truck for an hour" drive. and i noticed that at WOT on the flat at around 2800-3000 rpm, my boost starts to drop off from 25 plus to 15ish. is this normal? and on a side note, when i really get on it my scangauge reads boost up to 25, then throws out a negative number i was seeing -10 to -12? wtf is up with that? any help or info is appreciated.

Doug

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Black 2006(dec 05 build date)Reg cab Long Box 4X4 6SPD 6. 100,000 KM as of april 8 2012

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post #2 of 27 Old 03-21-2012, 07:37 AM
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Try tightening all you clamps. I would recomendd taking all your boobs off and cleaning them and then tighten them down really good.

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post #3 of 27 Old 03-21-2012, 07:38 AM
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Quote:
Originally Posted by WarChild View Post
Try tightening all you clamps. I would recomendd taking all your boobs off and cleaning them and then tighten them down really good.
Quoting so you can't change it later...

Freudian slip??? Got something on your mind???

Shawn Carlson
EvilEye@powerstroke.org

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2005 F250, CCSB, 6.0 PSD, FX4 (The Sweet Unit is white)
2008 F350, CCLB, 6.4 PSD (Brad-the wife's truck is black)




Engine Mods:
Fluidampr
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4" MBRP Exhaust
MTW Stage 1 Turbo
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Riff Raff Intercooler Boots
Gogo Diesel Direct Drive Solenoid
BulletProof All-Aluminum Radiator
BulletProof All-Aluminum Intercooler
BulletProof Oil Cooler System w/ Bypass Filter
SCT w/ Custom Tunes (TSD, DJ's, Innovative, Gearhead, QuickTricks)

Exterior Mods:
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Icon Adjustable Trac Bar
Firestone RideRite Air Bags
BDS Dual Steering Stabilizer
Aluminum Finned Differential Cover
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post #4 of 27 Old 03-21-2012, 07:40 AM
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Damn auto correct....lmao

White 04 F350 Lariat SRW/CC/LB/FX4 227,XXX+
Studs/BPD58V FICM Atlas40/BPD oil cooler/waterpump/7.3 fan
Edge insight CTS EGT/Turbo timer/FP SCT with ? Tune
Powermax w/KC billet wheel Warren 175/30%
5-8" MBRP Off Road Turbo Back/harpoon
2" Leveling/33' BFGATKO
ELC/PMM Coolant filter
aFe Stage2/EGR Delete


Semper Fidelis (Always Faithful) is the motto of the Corps. That Marines have lived up to this motto is proved by the fact that there has never been a mutiny among U.S. Marines.
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post #5 of 27 Old 03-21-2012, 07:41 AM
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Just messing, man.

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Proud Navy Vet
2005 F250, CCSB, 6.0 PSD, FX4 (The Sweet Unit is white)
2008 F350, CCLB, 6.4 PSD (Brad-the wife's truck is black)




Engine Mods:
Fluidampr
CCV Reroute (Reinstated)
4" MBRP Exhaust
MTW Stage 1 Turbo
Bulletproof 53V FICM
BulletProof EGR Cooler
BulletProof Water Pump
Riff Raff Intercooler Boots
Gogo Diesel Direct Drive Solenoid
BulletProof All-Aluminum Radiator
BulletProof All-Aluminum Intercooler
BulletProof Oil Cooler System w/ Bypass Filter
SCT w/ Custom Tunes (TSD, DJ's, Innovative, Gearhead, QuickTricks)

Exterior Mods:
Bilstein 5100 Shocks
Icon Adjustable Trac Bar
Firestone RideRite Air Bags
BDS Dual Steering Stabilizer
Aluminum Finned Differential Cover
Reese 16k Manual Slider 5th Wheel Hitch
Icon 2.5" Leveling Kit w/ F-350 rear blocks
20" BMF Novakanes wrapped in 33" Nitto Terra Grapplers
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post #6 of 27 Old 03-21-2012, 07:45 AM
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Mmmmmm.. Boobs....

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post #7 of 27 Old 03-21-2012, 07:45 AM
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Quote:
Originally Posted by Evil Eye View Post
Just messing, man.
Everyone loves a good boob cleaning.

White 04 F350 Lariat SRW/CC/LB/FX4 227,XXX+
Studs/BPD58V FICM Atlas40/BPD oil cooler/waterpump/7.3 fan
Edge insight CTS EGT/Turbo timer/FP SCT with ? Tune
Powermax w/KC billet wheel Warren 175/30%
5-8" MBRP Off Road Turbo Back/harpoon
2" Leveling/33' BFGATKO
ELC/PMM Coolant filter
aFe Stage2/EGR Delete


Semper Fidelis (Always Faithful) is the motto of the Corps. That Marines have lived up to this motto is proved by the fact that there has never been a mutiny among U.S. Marines.
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post #8 of 27 Old 03-21-2012, 07:53 AM
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Quote:
Originally Posted by WarChild View Post
Everyone loves a good boob cleaning.
You wouldn't be human if you didn't!

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post #9 of 27 Old 03-21-2012, 07:55 AM
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I have seen the Scangauge go into negative numbers on boost, but it was only over 25psi of boost. Not sure if the X-gauge isnt right for the truck or what.

As far as the loss of boost could be as simple as a boot(boob) or maybe an intercooler tank leaking under high boost numbers.

05 Extended Cab FX4
SCT w/ Gearhead Tunes
Ble-Blah mod...
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post #10 of 27 Old 03-21-2012, 07:58 AM
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I have noticed that mine will drop off sometimes as well, but no noticeable decrease in power. It's more evident when I tow my 5th wheel all loaded up, but that could be because I'm running my tow tune. I just figured that the PCM was determining that the VGT didn't need to be running that much boost, opened the vanes a bit and dumped off some boost. Like I said, I didn't notice a decrease in power when it happens.

Shawn Carlson
EvilEye@powerstroke.org

Proud Navy Vet
2005 F250, CCSB, 6.0 PSD, FX4 (The Sweet Unit is white)
2008 F350, CCLB, 6.4 PSD (Brad-the wife's truck is black)




Engine Mods:
Fluidampr
CCV Reroute (Reinstated)
4" MBRP Exhaust
MTW Stage 1 Turbo
Bulletproof 53V FICM
BulletProof EGR Cooler
BulletProof Water Pump
Riff Raff Intercooler Boots
Gogo Diesel Direct Drive Solenoid
BulletProof All-Aluminum Radiator
BulletProof All-Aluminum Intercooler
BulletProof Oil Cooler System w/ Bypass Filter
SCT w/ Custom Tunes (TSD, DJ's, Innovative, Gearhead, QuickTricks)

Exterior Mods:
Bilstein 5100 Shocks
Icon Adjustable Trac Bar
Firestone RideRite Air Bags
BDS Dual Steering Stabilizer
Aluminum Finned Differential Cover
Reese 16k Manual Slider 5th Wheel Hitch
Icon 2.5" Leveling Kit w/ F-350 rear blocks
20" BMF Novakanes wrapped in 33" Nitto Terra Grapplers
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