Engine/Transmission (1998.5 - 2002) Lift pump Failure

[Claw231]

For those of you who have had lift pump failures, I was wondering how many miles if failed in. Maybe there is some sort of trend with these things.



p. s. Feel free to mark more than one answer, I know some of you have had multiple failures.

 

[Truckie]

I have a 2001 with a 5 speed and only have 25,585 on the truck now and the lift pump went on my around 21,000 something. Truck ran fine one day and the next day it ran like s#ht. It would hit and miss when under hard accelerating from 2nd to 3rd it would miss spit sputter and blow all kinds of blueish white smoke. Took it to the dealer and went a few rounds with him and finally got it replaced when they realized the truck was a 2000 titled out as 2001 and I have some 00 and some o1 parts on the truck. When I told them to look in the 00 service book they found the problem and what they wanted to see and changed it out for me.

MIKE

 

[dresslered]

The lift pump issue really needs to be addressed by DC. Unfortunately, there are so many variables with the different modifications and set-ups that people have done on this site, it is really hard to get a true statistical value for the problem (other than everyone has experienced it!). As for me, I have a completely stock engine, the truck runs empty 95% of the time, and I had one fail at 31,172 (958. 9 hours) and now I have another one going out at 55,529 miles (1648 hours). The main reason that this truck was purchased was for the reliability factor. Daimler-Chrysler has really shot this to I TRIED TO BY-PASS THE CUSSING FILTER with their support!



P. S. It appears that Truckie slid in before me and that he is happy with the resolution. The problem is that if his truck actually sputtered due to a bad lift pump, his has taken on unknown damage (wear) to the injection pump. DC is betting that the injection pump will outlast his 100k warranty though.



P. S. S. People replying as 'it hasn't happened yet' either have too low of mileage, no fuel pressure gauge so they don't even know, or a 'Get out of Jail Free Card' from God.

 

[jbone]

I agree with Dave's last three statements---think this survey should only include those with pressure gauge, sorry but the guys without have no idea!!!!!!! R, J. B.

 

[mediccummin]

I voted twice

Because I'm on the 3rd one at 45k miles. They both lasted about 20k. Dealer would not replace either of them so I did it myself, at least I know it was done right. Later.....

 

[jmeehan]

My original pump lasted until about 33K miles. I installed my injectors at around 32K miles, and the clutch went in shortly after that.

Once the clutch was broke in I pulled the pressure down to 3 p. s. i. once, and 0 p. s. i. on the next run. My spare pump and high flow banjo bolts went in the next day.

At 110 m. p. h. and accelerating, up hill, it held at 6 p. s. i. Now I'm running NAPA additive. We'll see how long this one goes.

 

[clong]

I have 115K miles on my lift pump. I test the pressure on it at every fuel filter change. The original pump did not fail but was replaced at 23K miles under a recall notice.

 

[dresslered]

I test the pressure on it at every fuel filter change.

Congratulations clong. You possibly have a golden lift pump. However, I am not sure whether you a testing properly (please correct me if I am wrong). Idle pressures only work when the lift pump is already too far gone. You have to check the pressure's under WOT (i. e. under load) or perform a flow test. This is really the only way to determine the true state of you lift pump. Are you able to temporarily tape you pressure gauge to the windshield while you drive?

 

[jrobinson2]

Mine was still holding 7psi at wot at 88,000 miles but had dropped to 3psi the next time I checked at 101,000.

Jared

 

[diesel DOG]

good at 40,000 I put a Genos guage and it showed low 2. 5 WOT and 5 idle. Then the dealer checked it and said it was OK. I then checked it with mechanical guage and it was 11 or 12 at idle. Geno's is sending me new sender and gauge. The are great to work with and helped me check everything on the install. They are a rarity in business

 

[Turbo Horseman]

Grrrr... stupid,stupid lift pumps!

 

[clong]

Dresslered, I test with mechanical guage taped to windshield. Run out to my favorite flat place and run truck at WOT and see what pressure drops to. Has never been less than 11 psi and idles at 15. Thought about installing gauge but can't figure a way to place in the dash and don't like the pillar mounts.

 

[Mundgyver]

My lift pump is still good. I pulled it at 103,000 turns along with the OEM filter housing. Put on a FASS. I did not want to tempt the Lift Pump God to much longer.

 

[Sootscooter]

I had three lift pumps go out in 80,000 miles, all replaced under warranty. started bombing the truck and had my first experience changing it out for myself. I woulda loved to get my hands on that engineer! After I changed it, pressures are good for now. Funny that D/C did something so backwards and when the problem was brought to light, ignored it. FASS system is on the Christmas list... .

 

[JPLB22]

I voted " Hasn't yet ".



I do have a full time mechanical gauge mounted on the steering column. I have had it there since about 14,000 miles and now have 30,700. My pressures are starting to fall though. WOT used to be 10. 5 psi, it is now 8. 0 psi. I will be changing the pump this weekend, just for piece of mind. I also will be puting on a " Wildcat Max Flow ". I will be keeping my original pump for an emergency back up.



Jeff

 

[ntillm01]

52,500

2001 with no modifications or gauges. Seat of the pants feel told me truck wasn't happy. Routine oil change and fuel filter service confirmed the lift pump was out. I do service myself and add a fuel pressure/flow check when I do the fuel filter.



In contrast to most posts, mine did not stop flowing with little to no pressure. It was electrically out because the pump motor did not run at all.

 

[isb360]

Perhaps the poll should include a filter for those who vote "Hasn't yet" -- if you're in that category, how many miles is on your LP? Without knowing that, it becomes difficult to get a feel for the reliability of the pumps.



I have 106k on mine with no perceived problems. I have an ISSPRO mechanical FP gauge on the way (after no luck with AutoMeter electric gauges) from Wildcat. I'm almost dreading hooking up the gauge for fear of finding sub-par pressures..... fingers crossed... . sacrifices offered to Lift Pump God.



Tim

 

[Dsul]

140,000 miles and as far as I can tell the lift pump is original. I bought the truck used, but it looks just a cruddy as the rest of the underside of the truck. If it's not original, I know it has at least 45,000 under it's belt (15psi idle, 12 at 70mph, usually 9+ under moderate acceleration)

andy

 

[Sageair]

Am I reading too much into the poll numbers or does it seem that if your original lift pump makes it to 40,000 miles then the odds get pretty good that it will go alot longer?

 

[Cobra]

lift pump

my lift pump went out at 10,141 miles The truck ran perfect and the only indication was the FP gauge showed 3 psi at cruise and 0 at wot. The pump was replaced under warranty on 12-31-01, and the replacement is still going at 26,380 miles.



The FP now at idle is 13 and it doesn't drop below 12 at cruise. It was even better when the pump was new, but I may need to change my fuel filter, it has 11,000 miles on it.