12 Valve 2nd Gen Dodge Cummins 94-98 Discussion of 12 Valve 5.9 Liter Dodge Cummins Diesels with P7100 Injection Pumps

Lift Pump Symptoms

Thread Tools
 
Search this Thread
 
  #1  
Old 08-30-2010, 05:34 PM
bowtech's Avatar
Diesel Bomber
Thread Starter
Join Date: Mar 2009
Location: Arizona
Posts: 1,007
Received 11 Likes on 10 Posts
Default Lift Pump Symptoms

what happens when its going out? my truck started sputtering then it got to where when you put it in drive it idles rough i changed my fuel filter just a few ago and it was half full of fuel shouldnt it be full? how hard or long does it take to change the lift pump? whats to it?
 
  #2  
Old 08-30-2010, 07:00 PM
spetersen502's Avatar
Diesel Fan
Join Date: Aug 2009
Location: Council Bluffs
Posts: 31
Likes: 0
Received 0 Likes on 0 Posts
Default

Its going out you need to change it asap you dont ever want to run it long periods of time its not good at all on your pump i would suggest an upgrade to an airdog their the best
 
  #3  
Old 08-30-2010, 08:53 PM
phil's Avatar
Diesel Fan
Join Date: Aug 2008
Location: Prince Edward Island
Posts: 13
Received 0 Likes on 0 Posts
Default

i put a post up about our lift pump about a week ago, you should check it out because mine was doing the same as yours. its called truck would not start, figured out the problem.
 
  #4  
Old 08-30-2010, 10:36 PM
jrad989's Avatar
Diesel Enthusiast
Join Date: Jul 2009
Location: Canby, Oregon
Posts: 355
Received 22 Likes on 13 Posts
Default

is it the original pump? how many miles are on it?
 
  #5  
Old 08-31-2010, 01:38 PM
bowtech's Avatar
Diesel Bomber
Thread Starter
Join Date: Mar 2009
Location: Arizona
Posts: 1,007
Received 11 Likes on 10 Posts
Default

no it was changed a while ago a year or two
 
  #6  
Old 08-31-2010, 01:46 PM
NadirPoint's Avatar
Diesel Bomber
Join Date: Aug 2009
Location: CO
Posts: 2,257
Received 186 Likes on 159 Posts
Default

The only way to know what a fuel pump is doing is with a fuel pressure gauge.
 
  #7  
Old 08-31-2010, 04:09 PM
bowtech's Avatar
Diesel Bomber
Thread Starter
Join Date: Mar 2009
Location: Arizona
Posts: 1,007
Received 11 Likes on 10 Posts
Default

it tricky to swap out lift pumps? any tricks or it straight forward bolt of bolt on
 
  #8  
Old 08-31-2010, 04:27 PM
NadirPoint's Avatar
Diesel Bomber
Join Date: Aug 2009
Location: CO
Posts: 2,257
Received 186 Likes on 159 Posts
Default

2 bolts, 2 line connections, piece 'o cake.
 
The following users liked this post:
bowtech (08-31-2010)
  #9  
Old 08-31-2010, 08:07 PM
bowtech's Avatar
Diesel Bomber
Thread Starter
Join Date: Mar 2009
Location: Arizona
Posts: 1,007
Received 11 Likes on 10 Posts
Default

do you have to prime it or some thing? just pump it then crack injectors or what?
 
  #10  
Old 09-01-2010, 06:44 AM
NadirPoint's Avatar
Diesel Bomber
Join Date: Aug 2009
Location: CO
Posts: 2,257
Received 186 Likes on 159 Posts
Default

You may or may not have to prime anything. Just change it and crank, see if it fires.
 


Quick Reply: Lift Pump Symptoms



All times are GMT -5. The time now is 02:07 PM.