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DISTURBED · 10-08-2017, 05:12 PM

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?

10-08-2017, 05:12 PM	#1
DISTURBED 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.