What is killing my lift pump(s)??????
Thread Starter
Registered User
Joined: Mar 2005
Posts: 119
Likes: 0
Originally Posted by coalburner400
This one's a long shot but:
Open your filter can and drain it.... Then look for "bio-slime". The bio slime could be clogging up your water separator. If that's the case, powerservice has a product that can clear this up.
Also, did you try the campaign/recall pump? I'd really look for the underlying problem, but if the replacement pumps are that bad maybe the campaign pump would be something to try..?
Best of luck
Open your filter can and drain it.... Then look for "bio-slime". The bio slime could be clogging up your water separator. If that's the case, powerservice has a product that can clear this up.
Also, did you try the campaign/recall pump? I'd really look for the underlying problem, but if the replacement pumps are that bad maybe the campaign pump would be something to try..?
Best of luck
I have not tried the campaign pump as my Cummins dealer warranties the same model lift pump each time.
Thread Starter
Registered User
Joined: Mar 2005
Posts: 119
Likes: 0
Originally Posted by Clunk
Hey Wes,
Does any of the heavy diesel equipment you operate have electric lift pumps?
Does any of the heavy diesel equipment you operate have electric lift pumps?
Registered User
Joined: Jun 2002
Posts: 166
Likes: 0
From: Hill Air Force Base, UT
Wes,
Have you or your Cummins dealer took apart a failed lift pump to see why it failed?
If not, this may give us some clues to see why they are failing all the time on your truck. Hopefully, it is just the plastic vanes disolving and adding a diesel fuel supplent may help this.
I agree with you that the FASS system isn't a perfect answer, but it seems like the best option without going to a p-pump solution. I will going to the fass if my lift pump fails all the time.
On my truck, I installed the vulcan kit as you, but replaced the lift pump with one from NAPA. I have about 12,000 miles on it without any problems.
Best of luck and keep us informed,
Joe
Have you or your Cummins dealer took apart a failed lift pump to see why it failed?
If not, this may give us some clues to see why they are failing all the time on your truck. Hopefully, it is just the plastic vanes disolving and adding a diesel fuel supplent may help this.
I agree with you that the FASS system isn't a perfect answer, but it seems like the best option without going to a p-pump solution. I will going to the fass if my lift pump fails all the time.
On my truck, I installed the vulcan kit as you, but replaced the lift pump with one from NAPA. I have about 12,000 miles on it without any problems.
Best of luck and keep us informed,
Joe
Registered User
Joined: Sep 2002
Posts: 414
Likes: 0
From: Memphis, TN
On some trucks, I've read that that a fuel tank vent line has a rubber cap on the end that was *supposed* to be removed when the tank was installed. If left in place, your tank could be building up a vacuum as you drive - and KILL your lift pump. Do some searching on the various diesel websites; I bet you can find more details.
Last time I found one of those topics, I checked mine. It appears to be "OK", but I do still hear the system sucking air when I shutdown. And if I crack the fuel filler cap open it immediatly equalizes and gets quiet. I guess I need to crawl under the truck again too.
Last time I found one of those topics, I checked mine. It appears to be "OK", but I do still hear the system sucking air when I shutdown. And if I crack the fuel filler cap open it immediatly equalizes and gets quiet. I guess I need to crawl under the truck again too.
Registered User
Joined: Jan 2005
Posts: 3,899
Likes: 3
From: Yuba city Kalifornia
Just for what its worth ...I have seen my pumps do that too but then found ,that every time the heater grids kick on the LP pressure would drop off then shoot right back up when they kicked off..and so on and so on
MY .02
MY .02
Registered User
Joined: Sep 2003
Posts: 2,534
Likes: 0
From: Plano, TX
Originally Posted by Wes in TN
Just browsing online forums it seem FASS has a fair amount of failures and I've seen several threads indicating the customer service for FASS leaves something to be desired.
Well....somewhat true.....we used to have an issue with customer service until i came here and took care of that......
and some of the older motors were troublesome....but the new motors are night and day over the old ones. TONS less issues......
Registered User
Joined: May 2004
Posts: 287
Likes: 0
From: Terryville, Ct
Originally Posted by Wes in TN
~12 psi at idle
at idle, but 12 is not terrible. I've had a Cummins Pump in for almost a year and the pressure has been steady @ 22 psi and thats with a Holley Red Pusher pump which adds about 6 or 7 psi. I lost 3 pumps prior to the installation of the pusher. I'd look at another type of pump set up jmo.
Good Luck.
Thread Starter
Registered User
Joined: Mar 2005
Posts: 119
Likes: 0
Well.............This latest pump lasted almost two months. Pressure is fluctuating again, staying down around 5 psi most of the time. Something is wrong somewhere inside the tank. I can't think of anything else it can be. I don't know if I have the patience to chase this gremlin any more. I'm thinking seriously of trading this thing over the weekend.
Administrator
Joined: Sep 2002
Posts: 3,400
Likes: 1
From: Claremont, Virginia
I wouldn't buy a FASS. (cause I already got one)
Got tired of changing lift pumps all the time especially when the last one went out along the road in Lynchburg. Oh and did I mention it was the day before Thanksgiving? On the way home from Arkansas? And that it was 22 degrees out that morning? And that cars and trucks were whipping by and 80 MPH causing it to feel like about 12 below?
It may not be the best answer but it has been on there for more than two years now and does not miss a beat. FP is 15 or 16 all the time even with about 450 HP.
Got tired of changing lift pumps all the time especially when the last one went out along the road in Lynchburg. Oh and did I mention it was the day before Thanksgiving? On the way home from Arkansas? And that it was 22 degrees out that morning? And that cars and trucks were whipping by and 80 MPH causing it to feel like about 12 below?
It may not be the best answer but it has been on there for more than two years now and does not miss a beat. FP is 15 or 16 all the time even with about 450 HP.
Banned
Joined: Sep 2005
Posts: 225
Likes: 0
Originally Posted by volly818
Has any one ever thought of trying to put a fuel filter before the lift pump? I think I am going to in the next week or so. If you think about the internal workings of that pump it has to have a very small clearence between the housing and the rotors of the pump. If you get dirt through there and whats it going to do, it will score the pump and as it keeps doing this you get lower and lower performance. Thats just my opinion but I thought I would throw it out there and let you guys tear it up.