e fuel vaccum reference - Ford Powerstroke Diesel Forum
LinkBack Thread Tools Display Modes
post #1 of 6 Old 05-07-2012, 11:18 AM Thread Starter
Powerstroke.org Rookie
Join Date: Feb 2012
Posts: 8
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
e fuel vaccum reference

Does anyone know where to put a vacuum port to attach to the aeromotive regulator in the e fuel system?
RoadScholar is offline  
post #2 of 6 Old 05-07-2012, 03:47 PM
Compression Ignition Addict
StrokerIH's Avatar
Join Date: Jul 2009
Location: Van Wert, OH
Posts: 158
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
from what i have read its a good idea to leave it open or run a line from it down off the motor cuz if the regulator breaks down it will flow fuel threw that vacuum tube into the motor and cause a runaway.

97 F250 HD, XLT, ext. cab. long bed, 4X4, E40D, 3:55LS, 3" DP, 4" MBRP, 5 1/2" tip, No Cat, No Muffler, E-Fuel, TS 6 pos chip, Front add-a-leaf, CAI 6637, Marinco Block Heater Plug, 265/75r16 transforce a/t, custom made mirror extensions, door keypad
StrokerIH is offline  
post #3 of 6 Old 05-07-2012, 05:45 PM
Compression Ignition Addict
mjonesjr's Avatar
Join Date: Apr 2011
Location: Salem, IN
Posts: 999
Thanks: 0
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
The vacuum port you leave it open on a diesel. On a gas engine with a turbo you would put a boost line to it so the regulator could open or close depending on turbo demand.

1997 F-250HD Extended Cab 4x4 7.3 Powerstroke
3" Down Pipe to 4" Exhaust (Stainless) ~ Tymar Intake w/ AFE Big Boost Filter ~ TS 6 Position Chip ~ HPOP Cross Over Line ~ Regulated Return ~ E-Fuel System ~ Intercooled ~ CCV Mod ~ Dual Aeroforce Interceptor Gauges ~ Dana 60 Swap
mjonesjr is offline  
post #4 of 6 Old 05-08-2012, 04:21 PM
the baconator

terryknight's Avatar
Join Date: May 2009
Location: Easton MD 21601
Posts: 12,709
Thanks: 10
Thanked 126 Times in 120 Posts
Mentioned: 7 Post(s)
Quoted: 130 Post(s)
Feedback Score: 2 reviews
what he said ^^^^.

94.5 F250 Reg Cab 4x4 5 speed 4.10 276000 plus miles

97 F350 Crew Cab LB 4x4 5 speed 3.55 320000 plus miles (parts truck)

Originally Posted by alberta 7.3 View Post
YouTube: Providing idiots everywhere a podium to share their stupidity
terryknight is offline  
post #5 of 6 Old 05-10-2012, 06:20 PM
Join Date: Mar 2012
Posts: 81
Thanks: 0
Thanked 0 Times in 0 Posts
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Yep leave it open

Mike 1997 F250 totaled 11/19/12
Fordpride is offline  
post #6 of 6 Old 05-11-2012, 04:50 AM
Compression Ignition Addict
BrettMavriK's Avatar
Join Date: May 2011
Posts: 465
Thanks: 0
Thanked 1 Time in 1 Post
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Diesels are different than gas engines. The vacuum reference port is meant to regulate more fuel back to the tank at idle on a gas engine when vacuum is present, then give the rails more fuel when accelerating and vacuum diminishes. On a diesel, there is no natural vacuum at idle. Ford provided a belt driven vacuum pump and regulator for the Powerstroke so as to handle things that need vacuum like the brake booster and heater controls. This pump set up has the same vacuum throughout the rpm range, so there is no benefit for the vacuum boost reference port on an aftermarket fuel pressure regulator. Now some regulators can also reference turbo boost which could benefit fuel pressure under acceleration, but I don't think it would have significant adjustability, because the regulator would be closing off too much fuel return to the tanks long before full turbo boost came on. Also, you'd be introducing air in very close proximity to the fuel line system, which could have its' drawbacks as well.



"Whether You Think You Can Or You Can't,
Either Way, You Are Right...."
-Henry Ford

6 Door Powerstroke Bronco
BrettMavriK is offline  

Quick Reply

Register Now

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

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


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

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

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

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