Altitude problem? - Diesel Truck Forum - TheDieselGarage.com
Thread Details Posted by ianb1, this thread has received 5 replies and been viewed 833 times.

 
LinkBack Thread Tools Display Modes
post #1 of 6 (permalink) Old 01-09-2018, 03:27 PM Thread Starter
Junior Member
 
Join Date: Jun 2010
Posts: 4
Points: 359
Thanks: 0
Thanked 0 Times in 0 Posts
Altitude problem?

I have a stock '05 6.0 with 260k and just about rebuilt (hopefully) everything that there is to rebuild over the last 3 years: EGR delete, air intake, Y pipe, radiator, all injectors, glow plugs, stand pipe, dummy plugs, EBP sensor, ICP sensor, IPR, turbo. I am sure I have missed something but hopefully you get the picture. I have a ScanGuage so can monitor whatever is needed. Last pieces to be replaced are the turbo and EBP sensor 2 weeks ago and I am now left with the following symptoms: I live at 8900' and drive down to work each day to 5000'. Up where I live everything looks and drives great - turbo spools up/down (max BST low 20's with no trailer), VGT cycles from 50% down to 15% at idle, EBP reads from 15-30's. Truck drives normal. When I get "downhill" VGT tends to stay in the 50-60's range and my boost stays at high teens minimum and spools up above 30 (I have seen 35) on the slightest of inclines. The truck doesn't feel like it has as much oomph as normal and struggles to keep to 75MPH. I go to work, let it sit all day then drive home - it drives and acts normal (at least the last couple of days) all the way home - cruises at 75MPH NP. I haven't looked at MAP or the barometric pressure readings but is feels/seems to me like something is not adjusting for the change in altitude? Can the MAP sensor exhibit these symptoms or can the BARO sensor mess things up? I might be completely off so any suggestions are welcome.
Cheers,

Ian
ianb1 is offline  
Sponsored Links
Advertisement
 
post #2 of 6 (permalink) Old 01-11-2018, 04:50 PM Thread Starter
Junior Member
Threadstarter
 
Join Date: Jun 2010
Posts: 4
Points: 359
Thanks: 0
Thanked 0 Times in 0 Posts
Update - for what it's worth

I was monitoring EBP the last couple of days and I typically stay under 30 (Scangauge) - what I noticed today was when I got down to lower elevation my EBP would max out at 50 and it feels like I am towing something (obviously as the back pressure builds up) and my boost then starts to jump up to 33/4/5 on slight inclines or acceleraion - presumably to compensate for the back pressure. The only other thing of note is that MAP pretty much stays equal to boost - I would have thought that MAP would be greater than boost though?
For testing sake I pulled over turned the truck off, started it right back up and everything went back to normal? So it looks like whatever is causing EBP to increase is my problem - is my cat backing up - I don't think that this year ('05 Excursion) had an exhaust valve as did earlier years - if it why does turning off/on reset everything? Do I have an electrical problem? Perhaps worth flashing the truck ?
ianb1 is offline  
post #3 of 6 (permalink) Old 01-15-2018, 09:58 AM
Junior Member
 
Jasong's Avatar
 
Join Date: Feb 2015
Location: Plant City Fl
Posts: 314
Points: 35,581
Thanks: 41
Thanked 26 Times in 25 Posts
I don't know the stroller well but here goes.
I wouldn't think you would have an EBP gauge unless you did have an exhaust flapper.
Other vehicles run a different time map above a certain elevation. I'm sure Ford does too.
First, check that the baro is changing with elevation.
Second, check the exhaust flapper position sensor. It may not be telling the ECI that the flapper is closed. The flapper does a sweep on startup supposedly to check the sensor. It also helps keep carbon from causing it to stick.
Jasong is offline  
post #4 of 6 (permalink) Old 01-16-2018, 04:05 PM Thread Starter
Junior Member
Threadstarter
 
Join Date: Jun 2010
Posts: 4
Points: 359
Thanks: 0
Thanked 0 Times in 0 Posts
Thanks for the feedback jasong - the EBP reading is coming from the ScanGauge which is reading it from a EBP sensor that is (I believe) connected to the exhaust pre-cat - I think that there is not an exhaust flapper on this year - I believe that there was was on prior years but not '05 - I did verify that the baro is changing with elevation so that looks to be good.
Drive this AM - everything worked just fine ......
ianb1 is offline  
post #5 of 6 (permalink) Old 01-28-2018, 02:06 PM
Member
 
Join Date: Dec 2008
Posts: 1,210
Points: 83,580
Thanks: 186
Thanked 400 Times in 270 Posts
Sorry for the late response.

None of the 6.0L years had an exhaust valve.

All years have an EBP sensor although the early 03's that were re-programmed (re-flashed) after 04 had the EBP sensor input deleted and an inferred value was used. Again - this was ONLY for the early 03's. Your 05 has and uses the EBP sensor.

MAP should always equal boost + Baro.

Make sure your MAP sensor hose is not cracked or plugged up. Also check the nipple on the manifold for plugging.

Also verify that your EBP tube is not plugged. You can get a large diameter weed-eater string and run down the tube.

Mark
06 F250 CC SB FX4 Lariat;ARP studs;OEM gaskets;Banks exhaust;DynaTrac Ball joints;Coolant filter;High-Idle mod;RACCCV6000;JimmiJammers;Ravelco;SynchroMax xfer case;Fumoto valve;Harpooned;CPOhighwayProducts toolbox;tracrac;Fox Weatherboots;Wet Okole Seat Covers;BriteBox;Re-flashed;Quadzilla Recon XZT Fuel Press;Blue FPR spring;DashDAQ;PHP FICM;RiffRaff boots;DCPower270AXP;PowerInverter;Rancho7000's;BPD EGR cooler;One-piece HPOP fitting;D-plugs&standpipes;BPD BilletWaterPump;SCT w/ Matts SRL+;ELC Ultra;DuraTracs
bismic is offline  
post #6 of 6 (permalink) Old 01-31-2018, 07:10 AM
Senior Member
 
harry6.0's Avatar
 
Join Date: Dec 2008
Location: Spokane WA. area
Posts: 3,051
Points: 142,003
Thanks: 1,507
Thanked 990 Times in 755 Posts
To me it looks as if your turbo vanes are sticking...especially when you mentioned.... VGT cycles from 50% down to 15% at idle...normally it should cycle between 85-15% back and forth in stages at idle, if it's not, then the vanes are not fully sweeping from open to close and visa versa. This was programmed in years ago in all the factory programming flashes to sweep the vanes at hot idle in order to decarbon the vanes and keep things moving freely. If the vanes are sticking it would also explain your symptoms.

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  
Reply

Tags
altitude, map

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
Higher altitude jorr83 5.9L Cummins (2003-2007.5) 3 02-08-2011 03:18 AM
Tuning and altitude boggerman 2003-2007 6.0 Tuner Forum 6 05-05-2008 08:52 PM
altitude question... goldenfox 5.9L Cummins (2003-2007.5) 5 07-26-2007 08:25 PM
Altitude tuning killerbee LLY Tuner Forum 0 04-16-2007 06:30 PM
High altitude? 00turboPSD 1994-2003 7.3L Power Stroke 2 03-16-2006 09:26 PM

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