Yes truck is stock 9 10.11%
Yes and I run a box 6 6.74%
No truck is stock 41 46.07%
No and I run a box 33 37.08%


Bads = 9 +6 = 15.
OKs = 41 +33 = 74.

Isn't it 74:15 good to bad ? About 1 in 6 trucks (15 out of 89) has had a bad lift pump.

 

I made my own thread a few days ago and no one has much input I gotta agree tho, guages are cool!!

I wondered if these in-tank pumps were less susceptible to failure, whats the deal with them???

 

If you run a box and stress the system beyond its specs I don't consider that really a failure. Non box trucks with a failure I'd count.
Lots of injector probs on 4.5+ trucks you see they run a box.

 

111000 kms.69000 mile and still OK and it has towed for 39000miles fuel is filtered from aux tank before going into factory tank. Engine is stock exept for BHAF and Toner Mod. But I am looking at doing Superduty's Walboro pump mod before it leaves me.
Jim O

 

"If you run a box and stress the system beyond its specs I don't consider that really a failure. Non box trucks with a failure I'd count."

Box or no box makes no difference as far as a lift pump is concerned. The hardest thing on the lift pump is when not much fuel is moving, ie idle or small loads. At higher engine fuel usage more fuel moves through the pump and the backpressure falls, making it easy on the pump.

"Lots of injector probs on 4.5+ trucks you see they run a box."

Caused by the box, the lift pump or the CP3 ? Were they really injector problems or did they get replaced because the CP3 was acting up the tech couldn't diagnose it properly ? And if the CP3 was acting up or shot, was it due to a lift pump issue ?

 

Twice

first time around 40000km

second time around 90000km

 

A while back this has been discussed. Appears that most of the failures occur up north and in Canada. The steady use of #1 diesel and Canadian shale oil most likely is the cause for early lift pump deaths. Deaths in the lower 48, don't know. Maybe a bad pump to began with.

MikeyB

 

Good points. You can speculate until you puke blood. Like I said I'm not going to get caught up in the fear mongering that I "might" get stranded on the road. Lots of "maybe" in the world.
I don't know if idling is easier on the pump. I'd like to have the specs and the test reports before I came to that conclusion. I do believe some of the tuner boxes stress the components beyond their tolerances. People putting pusher pumps on because of zero fuel pressure running a box with heavy accel.
If we saw alot of injector probs on any HPCR box or not then I would suspect the injectors. Most posts I have read here that mention leaking injectors and you read the sig some sort of tuner is used. Is it used properly? I don't know. I would think you'd see repeated failures of injectors in the same truck if the fuel pumps were to blame. Some injectors are at really low mileage, so the pattern should repeat quickly.
Is the Walbro pump better than stock? Maybe.
Does DC and other manufacturers accept bids from the lowes bidders? Yep.
The redesign (in tank) might be because DC knows there is a problem, might be streamlining the assembly process. (how many different throttle cables for 3rd gens? Is one better than the other? or just a redesign?)

 

Yes I noticed that earlier. Maybe we should do a failure poll by region?

 

Does this mean the 05-06 don't have problems w/lift pump or are they just different problems?

Thanks

 

Number of failures is still at 1 in 6. (20 out of 118 trucks.)

You guys can believe whatever the heck you want.

Makes no difference to me.

I've done my part contributing to the board on this problem and others.

Good luck.

 

The in-tank lift pumps have only been out for a year and half (1 1/2 years) and I have only heard of one failure, which was more of a mount issue than the pump going bad, so no I have not heard of one in-tank lift pump going bad. When earlier build trucks come in for warranty work on the lift pump they are fitted with an in-tank lift pump. DC no longer sells the engine or fuel filter mounted lift pumps.

 

Sure is warm here today.

 

OOPPPS, I might be wrong about the block mounted electric lift pump, don't know for sure.

 

Superduty your input has been greatly appreciated and invaluable. Stick around and continue to post.

I only wish I had known of the correlation between the lift pump and the leaking CP3 pump when I had the CP3 replaced again 12/15/05. Had I then known what I do now I would have checked in to having the lift pump replaced also. Surely Star knew two weeks ago and should have had the tech check my lift pump. Oh well, DC must enjoy replacing the CP3 pumps. When this pump starts to leak in a year or so atleast I will know to ask about the lift pump replacement.