Turbo boost up and down. - Diesel Truck Forum - TheDieselGarage.com
Thread Details Posted by Ohio Eddie, this thread has received 14 replies and been viewed 8165 times.

Reply
 
LinkBack Thread Tools Display Modes
post #1 of 15 (permalink) Old 04-04-2014, 04:28 PM Thread Starter
Junior Member
 
Ohio Eddie's Avatar
 
Join Date: Oct 2005
Location: Oregonia, Ohio
Posts: 67
Points: 21,535
Thanks: 111
Thanked 4 Times in 4 Posts
Turbo boost up and down.

I have a 2006 Ford F-350 6.0 automatic with 100,000 miles on it, the engine is bone stock and runs good, my question is:
While driving at a steady speed, on let's say interstate highway at 65mph my boost gage(factory stock)will very from 5 to 10 while holding the throttle steady. Is this something I should be concerned about.

Ohio Eddie
----------------------------------------------------------------
2006 Ford, F-350, Lariet, 4x4 F/X, Crew Cab, SWB, SRW, 6.0 Powerstroke
-------------------------------------------------------------

MODS:
Dfuser coolent filter Kit.
MBPR 4'' Turbo back.
----------------------------------------------------------------
Toys:
----------------------------------------------------------------

2012 Harley Tri-Glide
2010 Jayco Octane Toyhauler
Ohio Eddie is offline  
Sponsored Links
Advertisement
 
post #2 of 15 (permalink) Old 04-04-2014, 05:24 PM
Junior Member
 
Join Date: Feb 2008
Posts: 149
Points: 22,010
Thanks: 2
Thanked 41 Times in 30 Posts
Garage
when do you notice it? is the truck accelerating up an incline on the highway that you may not seem very noticable?

2003 Ford F-250 SuperCab FX4
6.0L Turbo Diesel
RCD EGR Delete Kit, Sinister Diesel Coolant Filter, Warren Diesel 155cc/Stock Nozzle Injectors, ARP Headstuds, Innovative Diesel Tunes, 5" Straight Pipe Exhaust, Blue Spring Mod, 4.5" Lift Kit

2006 Ford F-250 CrewCab FX4
6.0L Turbo Diesel
Innovative Diesel Tunes, 4" MBRP Single Stack Kit w/ Side-By-Side Dual Aussie Stack, Blue Spring Mod, RCD EGR Delete, Warren Diesel 155cc/30% Nozzle Injectors, Sinister Coolant Filter Kit, One Piece STC Fitting, Updated Standpipes/Dummy Plugs, Variant Raim Air/Cold Air Intake, 6" Lift Kit, 37s on 20" wheels,
Fighting Irish is offline  
post #3 of 15 (permalink) Old 04-04-2014, 06:37 PM
Stuck in Commiefornia...
 
IdahoF350's Avatar
 
Join Date: Dec 2008
Location: Clearfield, Utah
Posts: 1,296
Points: 81,419
Thanks: 102
Thanked 447 Times in 315 Posts
Garage
Could be the unison ring in the VGT turbo is sticky or worn and the actuator is slowly compensating back and forth. Mine had a turbo at 85k for shaft play and a worn ring.

The Current Truck (Oct-2013 to Present):
1999 (Early) F-350 Lariat, CCLB, SRW, Black/Tan

7.3L Powerstroke, 4R100, 4x4, 3.73, 37x13.50-18s, '05 Axle Swap, 6" Fabtech lift, GTP38 "D66" turbo upgrade, SCT 4-position chip with custom tuning by me, Straight Piped 4" down pipe through 5" dual stacks, N-Fab full length triple steps, Pro-Tech cab guard and tool box, louvered 5th wheel gate, Hella 500 Fog and Driving lamps, much more to come...
The one I'll miss, (Mar-2009 to Jan-2014):
2000 Excursion XLT 4x4

6.8L V-10, 4R100, 4.30, 285/75-18, 271whp / 388wtq
The one I won't, (Jul-2005 to Sep-2012):
2005 F-350 XLT, CCLB, SRW, 4x4 FX4

6.0L PSD, ZF-6S650, 3.73, 35x12.5-18, 4.5" Lift
IdahoF350 is offline  
post #4 of 15 (permalink) Old 04-04-2014, 11:04 PM Thread Starter
Junior Member
Threadstarter
 
Ohio Eddie's Avatar
 
Join Date: Oct 2005
Location: Oregonia, Ohio
Posts: 67
Points: 21,535
Thanks: 111
Thanked 4 Times in 4 Posts
Quote:
Originally Posted by Fighting Irish View Post
when do you notice it? is the truck accelerating up an incline on the highway that you may not seem very noticable?
The boost gage varies at a steady speed running on level surface, I can understand the boost changing under a pull, but it will increase and decrease under a steady throttle on a smooth flat highway.

Ohio Eddie
----------------------------------------------------------------
2006 Ford, F-350, Lariet, 4x4 F/X, Crew Cab, SWB, SRW, 6.0 Powerstroke
-------------------------------------------------------------

MODS:
Dfuser coolent filter Kit.
MBPR 4'' Turbo back.
----------------------------------------------------------------
Toys:
----------------------------------------------------------------

2012 Harley Tri-Glide
2010 Jayco Octane Toyhauler
Ohio Eddie is offline  
post #5 of 15 (permalink) Old 04-05-2014, 02:52 AM
Senior Member
 
Weld engineer's Avatar
 
Join Date: Apr 2012
Location: Middle of the Mitten, MI
Posts: 1,324
Points: 48,506
Thanks: 866
Thanked 506 Times in 401 Posts
Garage
Be good to pick up a scangauge and see if the Vgt value is changing and if the scangauge Xgauge for boost agrees with the stock reading. I believe both are inferred values. I have a true pressure boost gauge since I don't have one stock. If the turbo us sticking it can be cleaned and/or unison ring replaced.

Early 2004 F-250 4x4 CC 6.0


2nd owner, ARP studs 1 at a time, Some parts missing in the exhaust path, BD intercooler hoses, Blue spring, MC filters, Sinister coolant filter, Exhaust manifold gaskets, WARN lockouts, Gold coolant, zoodad mod, autometer boost gauge, high idle mod, Scangauge 2, SCT X3 tuned from KEM, autometer fuel pressure gauge, Archoil 6200 in the fuel, FICM by Ed w/ATLAS40, autometer pyro gauge,'08 Alum Rear Diff cover, 5w-40 Rotella T6 w/ Archoil 9100 in it, zert in the slip joint, harpooned fuel tank, 6.4 banjos


Not a diesel mechanic in real life but I play one on the Internet
Weld engineer is offline  
post #6 of 15 (permalink) Old 04-05-2014, 09:08 PM
Senior Member
 
Join Date: Jan 2010
Location: Denver, CO area
Posts: 422
Points: 37,150
Thanks: 12
Thanked 75 Times in 61 Posts
Is this while the grade is changing? Are you going up and down hills?
For small changes in grade mine varies a bit.
If it's on flat ground or a hill where the grade is not changing (for example a consistent grade up or down) it should not vary too much.

06' F250 Mods:

Performance related:
-K&N E-0780 Air Box, ZooDad Mod
-Garrett Powermax Turbo, CFM+ Smallmouth Intake Manifold
-Blue Fuel Pressure Spring, Large fuel lines from pressure regulator to heads
-MBRP 4" Turbo back exhaust; cat installed
-SCT SF3 Tuner w/SRL custom tunes from Matt at GearheadAutomotivePerformance.com

Reliability Mods:
-Refurbished 50 volt FICM, Eliminated STC fitting, upgraded stand pipes and dummy plugs, Bulletproof Diesel EGR cooler, upgraded turbo oil supply and drain
-Oil change rotation; 5k-5W40/5k-15W40/5k-15W40
--Rotella T5 or Valvoline Blue Extreme 5W40, Rotella or NAPA 15W40, Archoil 9100 friction modifier (16 ounces to crank case; 10 ounces to each differential)
--2/3 Qt. tcw3 2 cycle oil per tank Power Service (5 oz. Stanadyne every tank)
-Cooling system flush with Restore and VC-9 @ 73,000 miles w/new thermostat
-Eliminated clunk while sitting at a light (75,000 miles); Lubed rear drive-shaft spline with Ford lubricant; Symptom returned at 100,000 miles...re-lubed at 112,000 miles....wow!! it's so smooth again.

Miscellaneous:
-1/2" shim on carrier bearing mount
-Batteries:
--Original Motorcraft lasted 4 1/2 years
--AutoZone Duralast Gold lasted less than 3 years
---(with 2/0 cables between + terminals)
--Still on 2nd set of Autozone Gold (replaced free)
-Alternator:
--DC Power 185 amp
Future Mods:
-Teflon sway bar bushings
-Moog Ball Joints (originals seem to be holding tight at 108,000 miles; it's just a daily driver, so this seems to make sense)
-Cooling system filter
-OEM HG/ARP studs
bustedknuckles is offline  
post #7 of 15 (permalink) Old 04-06-2014, 02:13 AM
Senior Member
 
harry6.0's Avatar
 
Join Date: Dec 2008
Location: Spokane WA. area
Posts: 3,051
Points: 142,040
Thanks: 1,507
Thanked 990 Times in 755 Posts
First I would check your air filter and check and clean your egr valve, then check all your intercooler intake boots for any tears or spilts....both items can effect boost readings and egr is most active at steady cruise speeeds...these are easy items to check and eliminate as possibilities.

Could very likely be your variable gate turbo vanes as Idaho mentioned too...very common.

What is your max boost under heavy throttle?...Should be minimum of 26psi.

Definitely recommend the ScanGaugeII as Weld mentioned.

Also any high pressure oil system leakage could cause the boost readings to fluctuate too, as fuel delivery will be unsteady and it can effect boost.

Again, recommend the ScanGaugeII, as you can read / ICP / IPR / FICM main power / Turbo vane position / and much more.

Harry

Jan 03' built 6.0/F250cc4wd trqsft/SCT-tuned by KEM-Performance/Garrett Powermax vg-turbo/blue spring mod/gauges=egt+boost+fuel+SG2/exhaust/airaid intake/DR 4.5 lift/dual bilsteins/315's/greasable ball joints/powerstop/smittybuilt/kc lights/high idle mod/roll-n-lock/Mobil Delvac1 ESP 5W40 with (Archoil AR9100 in the oil) and (AR6200 in the fuel)

Last edited by harry6.0; 04-06-2014 at 02:17 AM.
harry6.0 is offline  
post #8 of 15 (permalink) Old 04-08-2014, 05:22 AM
Senior Member
 
harry6.0's Avatar
 
Join Date: Dec 2008
Location: Spokane WA. area
Posts: 3,051
Points: 142,040
Thanks: 1,507
Thanked 990 Times in 755 Posts
Just to add...and Idaho is probably right on this one...I road tested an 06' 6.0L with a fella I know yesterday that is experiencing the same boost variations at steady cruise speed on flat freeway...his ScanGaugeII VGT reading would jump around and be reading 53-58% then drop to 25-35% then back up again to 63% as the boost gauge was fluctuating, the whole time ICP and IPR were holding steady as was his vehicle speed.

We then jumped in my truck and drove the exact same route and speeds...my VGT would lock and hold perfectly steady at around 43% and my AutoMeter boost gauge was steady as a rock.

I'm thinkin turbo vanes are sticking too in this case.

Harry

Jan 03' built 6.0/F250cc4wd trqsft/SCT-tuned by KEM-Performance/Garrett Powermax vg-turbo/blue spring mod/gauges=egt+boost+fuel+SG2/exhaust/airaid intake/DR 4.5 lift/dual bilsteins/315's/greasable ball joints/powerstop/smittybuilt/kc lights/high idle mod/roll-n-lock/Mobil Delvac1 ESP 5W40 with (Archoil AR9100 in the oil) and (AR6200 in the fuel)
harry6.0 is offline  
post #9 of 15 (permalink) Old 04-09-2014, 02:19 PM Thread Starter
Junior Member
Threadstarter
 
Ohio Eddie's Avatar
 
Join Date: Oct 2005
Location: Oregonia, Ohio
Posts: 67
Points: 21,535
Thanks: 111
Thanked 4 Times in 4 Posts
Thanks everyone for the info.

Ohio Eddie
----------------------------------------------------------------
2006 Ford, F-350, Lariet, 4x4 F/X, Crew Cab, SWB, SRW, 6.0 Powerstroke
-------------------------------------------------------------

MODS:
Dfuser coolent filter Kit.
MBPR 4'' Turbo back.
----------------------------------------------------------------
Toys:
----------------------------------------------------------------

2012 Harley Tri-Glide
2010 Jayco Octane Toyhauler
Ohio Eddie is offline  
post #10 of 15 (permalink) Old 04-09-2014, 03:25 PM
Junior Member
 
Join Date: Feb 2008
Posts: 149
Points: 22,010
Thanks: 2
Thanked 41 Times in 30 Posts
Garage
not to high jack your thread Eddie, but would sticking turbo babes cause the VGT to cycle when idling? when my truck idles you can hear the pitch of the exhaust time change like the vanes in the turbo cycle open and closed.

2003 Ford F-250 SuperCab FX4
6.0L Turbo Diesel
RCD EGR Delete Kit, Sinister Diesel Coolant Filter, Warren Diesel 155cc/Stock Nozzle Injectors, ARP Headstuds, Innovative Diesel Tunes, 5" Straight Pipe Exhaust, Blue Spring Mod, 4.5" Lift Kit

2006 Ford F-250 CrewCab FX4
6.0L Turbo Diesel
Innovative Diesel Tunes, 4" MBRP Single Stack Kit w/ Side-By-Side Dual Aussie Stack, Blue Spring Mod, RCD EGR Delete, Warren Diesel 155cc/30% Nozzle Injectors, Sinister Coolant Filter Kit, One Piece STC Fitting, Updated Standpipes/Dummy Plugs, Variant Raim Air/Cold Air Intake, 6" Lift Kit, 37s on 20" wheels,
Fighting Irish is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Diesel Truck Forum - TheDieselGarage.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
turbo boost dusty 6.5L Diesel Engine 1 04-01-2010 08:56 PM
Turbo Boost No Boost Burner718 1994-2003 7.3L Power Stroke 16 04-02-2008 05:14 AM
Turbo boost??? Dmax05 Duramax 2004.5-2005(LLY) 2 03-18-2008 05:48 AM
turbo boost IDImonsterstack 7.3L and 6.9 IDI (Pre 1994) 6 12-21-2007 08:45 AM
Turbo Boost ? $DIESEL 1994-2003 7.3L Power Stroke 14 11-26-2006 06:15 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome