General Diesel Discussion Talk about general diesel engines (theory, etc.) If it's about diesel, and it doesn't fit anywhere else, then put it right in here.
Sponsored by:
Sponsored by: CARiD

Purging air from fuel system

Thread Tools
 
Search this Thread
 
Old Sep 15, 2005 | 12:22 PM
  #1  
remarc31's Avatar
Thread Starter
Registered User
 
Joined: Oct 2003
Posts: 29
Likes: 0
From: Texas
Purging air from fuel system

My lift pump has been relocated to the rear near the tank. If I replace the lift pump with a new one and its free of fuel, what procedure should I use to get rid of the air.
Reply
Old Sep 15, 2005 | 01:41 PM
  #2  
farmer dave's Avatar
Registered User
 
Joined: Jul 2003
Posts: 831
Likes: 0
From: Alma, MI
Is the new pump going to be run through the stock filter? If so I would start by cracking the bleed screw and bumping the starter. If the new pump is wired through the wiring harness then is will run for a while. Once fuel starts coming out close the bleed screw and try starting. If it doesn't start then you will have to crack the injector lines. Some say to only crack 3 at a time but I have never had any luck with that, I just crack them all. It is harder to get them all closed, but atleast you know that the air is out. It will run ruff until you get all of the lines closed and then it should smooth out.
Reply
Old Sep 15, 2005 | 07:53 PM
  #3  
Vulcan's Avatar
Registered User
 
Joined: Dec 2004
Posts: 138
Likes: 0
From: Vancouver, USA
I just bump the starter to get the pump running. Every few bumps I try and start it. I repeat the process till she fires. I fool with my fuel system a lot and this works every time.
Reply
Old Sep 15, 2005 | 08:23 PM
  #4  
ftltmp's Avatar
Registered User
 
Joined: Nov 2003
Posts: 526
Likes: 10
From: Arizona
I am sure this will get alot of slack. but what we do at work is loosen the fws top and take an air hose and blow into your vent line sloooowly until it starts filling the fws.Once you have it running you can release the fuel cap to release any pressure.I know we dont have any trouble, not sure if it will work on our system,although it should. Just my .02
Reply
Old Sep 15, 2005 | 09:46 PM
  #5  
Patrick Campbell's Avatar
Registered User
 
Joined: Mar 2003
Posts: 1,787
Likes: 0
From: Central VT
Originally Posted by Vulcan
I just bump the starter to get the pump running. Every few bumps I try and start it. I repeat the process till she fires. I fool with my fuel system a lot and this works every time.
Where does the air go when you bump the starter??

I have to replace a HUGE fuel filter here in a few days that is located back by my tank, and I haven't figured out how I am going to do it. I was hoping I could just bump the starter and it would fill the filter up with fuel and then start up...

The system is entirely replaced from the VP44 back to the tank (no stock filter housing, no stock lift pump).
Reply
Old Sep 15, 2005 | 10:02 PM
  #6  
fschiola's Avatar
Registered User
 
Joined: Dec 2003
Posts: 1,032
Likes: 1
From: Where water boils at 193.4°
Originally Posted by njoverkill
Where does the air go when you bump the starter??
It will move through the IP and return to the tank just like extra fuel would.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
maddddog
12 Valve Engine and Drivetrain
3
Aug 16, 2019 07:20 AM
krowe111
3rd Gen Engine and Drivetrain -> 2007 and up
8
Jun 21, 2011 09:22 PM
herb
Other
4
Jul 18, 2008 08:25 AM
cLAYH
2nd Gen. Dodge Ram - No Drivetrain
3
Jul 6, 2008 03:44 PM
joel
Other
6
Apr 4, 2005 08:06 PM




All times are GMT -5. The time now is 07:13 AM.