Fuel Lift Pump Power Problems - DodgeForum.com

Go Back   DodgeForum.com > Dodge Trucks > Dodge Ram > Dodge/Ram Diesel
Log In 

Dodge/Ram Diesel Discussions on all generations of Cummins Diesel powered Rams plus the new Eco Diesel

Fuel Lift Pump Power Problems

Thread Tools Search this Thread
Old 06-15-2010, 10:05 PM
Keith P Keith P is offline
Registered User
Join Date: Jun 2010
Posts: 2
Default Fuel Lift Pump Power Problems

Am having issues maintaining power to my 2006 Ram 2500 Cummins lift pump. We can not find the fuse and/or relay switch to troubleshoot. Where is it located and what would cause the power to stop, then turn back on? We've only bumped to test it.
Reply With Quote
Old 06-15-2010, 11:00 PM
Join Date: Aug 2006
Vehicle: 2001 Dodge Ram 3500 CTD
Location: Avondale az/morganton nc
Posts: 145

The fuel lift pump will only turn on for 30-60 seconds when you bump the key. The ecm controls the on and off time of the fuel life pump. If im not mistaken its pwm (pulse width modulated) so it never runs wide open all the time the ecm determines the duty cycle of the pump.
01 3500 4x4, edge comp,sbc clutch,stage 2 jammer nozzels,4 inch straight pipe,amsoil cai,aurura 3000,raptor fuel pump,autometer gauges
Reply With Quote
Old 06-15-2010, 11:08 PM
Coal Train's Avatar
Coal Train Coal Train is offline
All Star
Join Date: Dec 2008
Vehicle: 2006 Twin Turbo CTD, 742 HP/ 1456 TQ
Location: East Alabama
Posts: 863

When you initially turn the key on, the pump will cycle for 1.5 seconds.

If you bump the starter, the pump will cycle for 20 seconds.

How are you measuring or what is causing you to think you have a power loss?

Do you have a fuel pressure gauge that is showing no fuel pressure?

That thing gotta Hemi?...... I guess ya better bring two of 'em then!
Reply With Quote
Old 06-16-2010, 12:42 AM
Keith P Keith P is offline
Registered User
Join Date: Jun 2010
Posts: 2

We had a fuel error and checked various fuses and connections with a standard test light to make sure everything was getting power...the lift pump was not. However, we did turned the ignition and did the bump and did experience as you suggested. However, we have since removed the fuel tank and are in the process of replacing the pump but are concerned there might be an electrical issue...based on what I see here, perhaps not?
Reply With Quote

Similar Threads
Thread Thread Starter Forum Replies Last Post
2004 ram hemi low speed acceleration john_2216 3rd Gen Ram Tech 6 11-09-2015 10:42 PM
FS[Engine/Transmission]: 5.2L Short Block w Listed Parts rampuppy User Classifieds 3 07-08-2015 04:10 AM
New truck, with issues OptimalRhyme 2nd Gen Ram Tech 8 07-06-2015 11:06 AM
1995 V10 Bad camshaft position sensor ? Where can I get one? 95Ram2500v10 2nd Gen Ram Tech 4 07-05-2015 01:43 PM
Can electric fuel pump cause explosion RM-D150 1st Gen Ram Tech 1 07-04-2015 09:23 AM

cummins, fuel, lift, power, pump

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off

Forum Jump


All times are GMT -4. The time now is 07:19 AM.