Engine/Transmission (1998.5 - 2002) Follow up to lift pump survey

[FDNYMOPARGUY]

In an effort to get a more accurate picture of when and why these lift pumps fail, more info is needed on the details of each truck. Obviously the lift pump design is flawed, but there are probably some conditions which will accelerate this failure rate. I don't think a simple "has your lift pump failed" survey says it all. How about members post all pertinent info about a truck and its lift pump failures, then a pattern can be made based on milage, year, bombs, etc. What I propose is:



Year/milage/cab and body configuration(ex. Quad/Long)/Fuel System related bombs(computer,injectors,larger lines/fittings), and milage at which they where done/Number of lift pump failures(or none)/milage at failure(s)/most recent fuel pressure #s



Examples:

02/38000/QuadShort/no fuel bombs/no failures/14 idle,11 load,9 WOT



01/67000/RegLong/edge ez@34000/1 failure@51000 miles/13 idle, 10 load, 7 WOT



Sure there are more factors involved, but this is an effort get a more focused picture than what we have now. Every 20 posts or so I'll update the poll results by catagory.

Any takers?

 

[ntillm01]

01/54300/quad3500long/stock fuel system/no prior failures/symptom-pump motor quit@52500/15-16 psi idle

 

[dnesbitt3]

survey

99/170000/Quadshort/stock/no failures/no way of measuring fuel pressure

 

[gonehuntingagain]

2000 quad cab, short bed, completely stock, lift pump replaced at 60,000 miles due to 5-7 psi cruising, 0 at WOT.

 

[rbagley]

'98. 5 24V 2500 auto 4x4 long bed. No symptoms of failure. Changed out at 78,000 miles due to concern over the possiblity of failure while in a remote area.



I'm currently looking into installing a mechanical gauge to monitor the pressure at the fuel filter. I just have to find a mechanical gauge.

 

[dknoch]

02/35000/quadLong/edge ez@25000, 275inj. @30000/1 failure@34000 miles/14 idle, 11 load, 6 WOT

 

[Dsul]

99/140,000/QuadShort/APB and timing box, 130hp injectors@ 98000 miles/ no failures/ Idle:14-15, Normal Load: 11/13, WOT:about 5-7

 

[2ndgen2500]

99/65000/quadshort/ edgedragcomp, DD3s/ no failures/

 

[mike,j]

99,quad,short box,stock 4x4. . ist lift pump 65000 . . 2nd lift pump 85000. . injector pump 85000. . no gauges

 

[GIT-R-DONE]

02 Quad Cab Short , 1st@29,000, stock, minus muffler, 8 idle 5cruise and 2 WOT.

installed FASS, no more DC lift pump

 

[Mad Bomber]

pump failer

01/51K/ quad long/comp,3/8th" AN fittings and a pusher pump done at 15K/ failed at 36. 6K/21 PSI idle16WOT

 

[JFinke]

01 QC LB 4X4 258,000 miles Dr. P stage III since new new LP at 80K and 160K pump now has 12 idle 9 cruise and 4 WOT. New LP on way.

 

[Steve St.Laurent]

98. 5

------

140,000

------

QuadLong

------

Powermax1@28,000

275 rv+PM1@38,000

275 rv+PM3@55,000

275 rv+Custom PM3 with 70% duty cycle@65,000

------

failure at ~38,000 miles (don't know when pump actually went bad, got the truck w/24,000 miles on it and know it was bad at 28,000)

failure at ~46,000

failure at ~49,000

failure at ~54,000

failure at ~60,000

replaced pump at that point and added 7 psi carter pusher pump inline with no replacements since

------

20 idle, 19 load, 16 WOT

 

[Cobra]

lift pump failure

2001. 5 RAM lift pump failed at 10141 miles. Mods, Edge EZ, straight pipe, exhaust brake and gauges. Mods had only been on truck for 1 month and about 500 miles. Fuel pressure was at 3 psi cruis and 0 at wot. pump replaced under warranty 12-31-01 and still in service.



My truck is extended cab with long bed and 5 speed trans

 

[dborders]

lift pump failure

Lift pump failure



99/96,000/quad long/no bombs

1 pump failure at 74,000 miles. No symptom. Could not prime fuel filter after change. Checked pressure with pump running and found to be zero. Pressure after pump change is 15 psi at idle.

 

[MrFixit]

01. 5/25,600/quad,long,6spd/4" exhaust,drop in AFE, gauges/1@25,600mi. , leaking/15/13/8, new pump 12. 5/10/6



Mods were done at 20,000k mi. marker, all stock before that.

 

[Dkevdog]

2001/3500 HO/ 53,200/ Quad/ EZ, 275's/ 4" Jardine & AFE-



First Pump died down at 37K, with no mods, second one is on its way now, going in next week for hopeful replacement: Currently:

13 Idle, 10 Cruising, 5-6 at WOT.



Kev

 

[kaptn]

Original pump at 70,000 miles. 50,000 miles of drag racing. Auxilliary pump addedat 50,000 miles. 14 psi at idle, 5-8 normal driving, 0 at W. O. T. without auxilliary.

 

[GarrettPetersen]

98. 5, 81677, Quad cab, Edge comp drag carter pusherpump, 1 at 53000 and 1 at 53080 along with an injection pump, latest pressure 22. 5# at Idle 18-20# cruise and 15 #at WOT

 

[dresslered]

Year/milage/cab and body configuration(ex. Quad/Long)/Fuel System related bombs(computer,injectors,larger lines/fittings), and milage at which they where done/Number of lift pump failures(or none)/milage at failure(s)/most recent fuel pressure #s





2001. 5/55,529 miles/Qaud HO 3500, Long, 4x4/Engine totally stock (truck BOMBed though)/1st pump failed and self replaced at 35,609 (1107 hrs. )/second lift pump failing at 55,529 miles (1648 hrs. )--have replacement on passenger seat.



C'mon DC! My 1972 Mercedes is still running on the original pump!!!