Advertisement |
|
|
|
If this is your first visit, be sure to check out the FAQ by clicking the link above.
You may have to register before you can post: click the register link above to proceed.
To start viewing messages, select the forum that you want to visit from the selection below.
|
10-08-2017, 05:12 PM
|
#1
|
Name: DISTURBED
Title: YEA WE RIDE THE SHORT BUS
Status: Not Here
Join Date: Nov 2007
Location: Winchester, Va
Member`s Gallery
Posts: 6,417
|
Tunes, parts and Mpg
So I have this 07.5 that I've been fight a rail pressure code issue. I have changed almost every thing in the fuel system for different parts and it still sets the low rail pressure and low lift pump codes daily. Something I have noticed was when the truck had the original 400k mile parts on it, I would get 18-19 mpg on the highway just the truck by itself. So as I've switched the injectors, cp3, rail plug, ect. I'm now down to 13-14 mpg highway. I've not changed the tune and fuel pressure is 14-15 psi which FASS says is fine. Anyone else ever had this drastic of a drop by swapping stock parts for stock parts?
__________________
Thanks, Jeremy
01 CTD Retired sled puller, dedicated "Twin Turbo" tow rig
96 CTD "TOO" Disturbed 3.0 - Built by Disturbed Diesel Performance
96 CTD "The Sickness" 2.6/2.8- Built by Disturbed Diesel Performance
Last edited by DISTURBED; 10-08-2017 at 05:14 PM.
|
|
|
10-08-2017, 07:49 PM
|
#2
|
Name: turboram
Title: spinny shiny things
Status: Not Here
Join Date: Aug 2012
Location: oh
Member`s Gallery
Posts: 646
|
Yes,rail plug is leaking under higher pressures. Sand the rail plug flat and install a copper washer under it then crank it down
__________________
70 dodge powerwagon 3" lps puller "Frank"
|
|
|
10-08-2017, 08:59 PM
|
#3
|
Name: DISTURBED
Title: YEA WE RIDE THE SHORT BUS
Status: Not Here
Join Date: Nov 2007
Location: Winchester, Va
Member`s Gallery
Posts: 6,417
|
Quote:
Originally Posted by turboram
Yes,rail plug is leaking under higher pressures. Sand the rail plug flat and install a copper washer under it then crank it down
|
Hmm, interesting. I will have to try that
__________________
Thanks, Jeremy
01 CTD Retired sled puller, dedicated "Twin Turbo" tow rig
96 CTD "TOO" Disturbed 3.0 - Built by Disturbed Diesel Performance
96 CTD "The Sickness" 2.6/2.8- Built by Disturbed Diesel Performance
|
|
|
10-09-2017, 05:45 AM
|
#4
|
Name: 06 DIESEL
Title: Dead Eye Firearms LLC
Status: Not Here
Join Date: Sep 2007
Location: Airville, PA
Member`s Gallery
Posts: 5,113
|
Have you checked the FCA harness? Mine was setting high rail pressure, and was commanding 100% due to an internal wire problem. Might be worth the $17 for the replacement piece.
__________________
Travis
My rig - 2021 Mega 3500 SRW
My Classic - 79 Chevy Silverado
Quote:
Originally Posted by RonA
Trucks are like women. Sometimes you just need to spend money on them to keep them happy.
|
|
|
|
10-09-2017, 09:54 AM
|
#5
|
Name: DISTURBED
Title: YEA WE RIDE THE SHORT BUS
Status: Not Here
Join Date: Nov 2007
Location: Winchester, Va
Member`s Gallery
Posts: 6,417
|
Quote:
Originally Posted by 06 DIESEL
Have you checked the FCA harness? Mine was setting high rail pressure, and was commanding 100% due to an internal wire problem. Might be worth the $17 for the replacement piece.
|
I've got a gauge for the rail and it builds 21-22k cold and as soon as it warms up it will start setting the low supply pump and low rail code. It will drop to 19k and under a hard pull 16-17k. I can live with the low rail code but finding the issue would be nice. I'm more curious about the loss of mpg. Truck has way more power after swapping parts but the economy has gone down.
__________________
Thanks, Jeremy
01 CTD Retired sled puller, dedicated "Twin Turbo" tow rig
96 CTD "TOO" Disturbed 3.0 - Built by Disturbed Diesel Performance
96 CTD "The Sickness" 2.6/2.8- Built by Disturbed Diesel Performance
|
|
|
10-09-2017, 10:06 AM
|
#6
|
Name: BRE
Title: Too Much Time
Status: Not Here
Join Date: May 2010
Location: Southwest MO
Member`s Gallery
Posts: 12,705
|
I’m curious about the plug and/or connecting tubes.
Sent from my iPhone using Tapatalk Pro
__________________
Rick
07 Dodge 3500 - Tow mirrors, silencer ring MIA, Spectra air filter.
Quote:
Originally Posted by jfaulkner
There really is nothing better than OEM. That goes for anything from turbos to boobs.
|
RIP Dex KCCO
|
|
|
10-10-2017, 03:55 PM
|
#7
|
Name: dangerous06
Title: diesel tech
Status: Not Here
Join Date: Mar 2008
Location: Escondido CA
Member`s Gallery
Posts: 3,564
|
I've had that happen it's several things. Old injectors were worn and injecting more or less fuel than stock. PRV may be malfunctioning letting pressure by. and then Fuel pressure sensor has been found to cause havoc! Is the truck defueling when the CEL comes on?
__________________
E.D. 66-74-091, T-4 exhaust, 2 Micron filter pre CP3, EFI, S&B intake, ARP 625 head studs, 182-214 Hamilton Cam,springs and push rods,40% injectors, Banks Intercooler, T&C CP-3 & PRV, Built
48RE, 5" exhaust,Carrillo rods, Pacbrake!
Last edited by dangerous06; 10-10-2017 at 04:05 PM.
|
|
|
10-10-2017, 05:18 PM
|
#8
|
Name: DISTURBED
Title: YEA WE RIDE THE SHORT BUS
Status: Not Here
Join Date: Nov 2007
Location: Winchester, Va
Member`s Gallery
Posts: 6,417
|
Quote:
Originally Posted by dangerous06
I've had that happen it's several things. Old injectors were worn and injecting more or less fuel than stock. PRV may be malfunctioning letting pressure by. and then Fuel pressure sensor has been found to cause havoc! Is the truck defueling when the CEL comes on?
|
No it doesn't defuel. All I've noticed is a little power loss and the rail guage shows less psi then it did before it set the code.
__________________
Thanks, Jeremy
01 CTD Retired sled puller, dedicated "Twin Turbo" tow rig
96 CTD "TOO" Disturbed 3.0 - Built by Disturbed Diesel Performance
96 CTD "The Sickness" 2.6/2.8- Built by Disturbed Diesel Performance
|
|
|
10-10-2017, 07:20 PM
|
#9
|
Name: biggy238
Title: Too Much Time
Status: Not Here
Join Date: Aug 2008
Location: Just North of Wrong
Member`s Gallery
Posts: 10,798
|
This sounds like aerated fuel to me. Does it always start like it should?
Sent from my XT1575 using Tapatalk
__________________
Check out @bdmaximusworx
05.5 Campanella White TDi Jetta 5spd 45.5MPG
-Little Sexy
'10 Silver F250 CCLB 4X4 6.4L cummins Swapped
Insta @trash.panda250
Last edited by biggy238; 10-10-2017 at 07:25 PM.
|
|
|
10-10-2017, 07:57 PM
|
#10
|
Name: DISTURBED
Title: YEA WE RIDE THE SHORT BUS
Status: Not Here
Join Date: Nov 2007
Location: Winchester, Va
Member`s Gallery
Posts: 6,417
|
Quote:
Originally Posted by biggy238
This sounds like aerated fuel to me. Does it always start like it should?
Sent from my XT1575 using Tapatalk
|
Yea for the most part and no external leaks
__________________
Thanks, Jeremy
01 CTD Retired sled puller, dedicated "Twin Turbo" tow rig
96 CTD "TOO" Disturbed 3.0 - Built by Disturbed Diesel Performance
96 CTD "The Sickness" 2.6/2.8- Built by Disturbed Diesel Performance
|
|
|
10-11-2017, 07:19 PM
|
#11
|
Name: dangerous06
Title: diesel tech
Status: Not Here
Join Date: Mar 2008
Location: Escondido CA
Member`s Gallery
Posts: 3,564
|
I assume new CP3. And the return banjo on the back of the head? But like Biggy said if it's sucking air that would cause it but I'm sure your gonna say it has a sump! So maybe do a bucket test on the returnsee if it's aerated.
__________________
E.D. 66-74-091, T-4 exhaust, 2 Micron filter pre CP3, EFI, S&B intake, ARP 625 head studs, 182-214 Hamilton Cam,springs and push rods,40% injectors, Banks Intercooler, T&C CP-3 & PRV, Built
48RE, 5" exhaust,Carrillo rods, Pacbrake!
|
|
|
10-11-2017, 08:47 PM
|
#12
|
Name: YoungDiesel27
Title: Never Enough Time
Status: Not Here
Join Date: Jul 2010
Location: West Virginia
Member`s Gallery
Posts: 825
|
My bet is a leak between rail and relief valve. I've now had several high mileage rails leak there.
__________________
EFI Live, HP Tuners, Smarty custom tuning
|
|
|
10-12-2017, 03:32 PM
|
#13
|
Name: biggy238
Title: Too Much Time
Status: Not Here
Join Date: Aug 2008
Location: Just North of Wrong
Member`s Gallery
Posts: 10,798
|
Quote:
Originally Posted by dangerous06
I assume new CP3. And the return banjo on the back of the head? But like Biggy said if it's sucking air that would cause it but I'm sure your gonna say it has a sump! So maybe do a bucket test on the returnsee if it's aerated.
|
You have to be careful looking at the return side for aeration. Beer Head = OK
Big bubbles not ok
Sent from my XT1575 using Tapatalk
__________________
Check out @bdmaximusworx
05.5 Campanella White TDi Jetta 5spd 45.5MPG
-Little Sexy
'10 Silver F250 CCLB 4X4 6.4L cummins Swapped
Insta @trash.panda250
|
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
All times are GMT -5. The time now is 08:00 PM.
|