???just installed guages on my 98.5 24 v and holds 10psi at idle and about 8psi wot. im thinkin lift pump bad but not sure what to do . i dont think warranty will handle it .how much pressure should i have.sender is in filter can on pre filter side.i got a tst pm3 new in box waitin to be put in but scared of killing inj pump.truck has 34000 on it .where is the best place to get a good lift pump or does anybody knowcummins part #.thanks for all of your help !!!!!

 

Welcome ADGR71!<br>Your Cummins has a 100K warranty and a Cummins dealer or a Dodge dealer should fix it for FREE.<br>I'm not sure of the specs the pump has to get down to before they'll change it out though. If the pressure isn't low enough, according to their expectations, they won't change it under warranty.<br>Many would rather just eliminate the stock fuel pump for an aftermarket, which is usually more reliable. You can look through the Aftermarket forum and see discussions on those.<br><br>Chris

 

hey stamey thanks for replying. i figured the 3 year or 36000 warranty wuld have applied but you think the 5 year 100000 cummins warrany woul d take care of it thanks!! ???

 

Oh, I'm sure of it. I have a 99 that had the lift pum p go out, at about 55K. The Dodge ******* replaced it for free, and even bought the tow to their facility.<br>Mine was absolutely dead. As I said, yours might be on the line where they won't replace it until it gets worse.<br>Before you take it in you might want to try another gauge on it to make sure you are getting accurate readings. This will put you on better ground when you go in there and tell them what's happening and then they tell you you're wrong. See the other thread, Lift Pump vs the *******.<br><br>Chris

 

as of now there are no reliable lift pump replacements the holley blacks are not holding up to the job.Dont think cummins will warranty the pump unless you buy it from them but dodge should.

 

Advanced Diesel has one that they say is really good. If my Holley Blue doesn't work out I will get one of these:<br>http://www.smokindiesel.com/Dodge/24...ngineering.htm<br><br>When I was at the Cummins dealer the other day he said he'd put one on my truck if I could leave it, but I didn't have time. This is not to say that he wouldn't have gotten it on then said, &quot;Oh no, we can't do that warranty.&quot; Buyer beware.<br><br>Chris

 

???dou you guys think yhe lift pump is weak with 10 at idle and 8 wot

 

Yes, it is weak, but not DOA. Mine has 14.5-15 at idle and 11 at WOT.<br><br><br>Chris

 

I just got my Briar Hopper FP gauge today (thanks to the guys at BMD ;D ) and my readings are just about the same as that. I'm not worried at the moment but any lower and I think i'll be going for a new pump. I'm also gonna try some new banjo's from Wildcat Diesel to see if it will help a little with the pressure. FWIW the pump on my truck was replaced about 2 years ago...after the old one murdered the injector pump :'(

 

adgr71<br>Are you sure on your psi numbers? I would think that 10 at idle would drop a lot lower than 8 at wot.I had pumps replaced in both trucks recently and at 8psi idle, I could pull them to 0psi at wot. <br>The latest # from Cummins is 3990105, not sure if you will need the pigtail #4025182.<br>If you take it to the dealer tell them it is stumbling, hard starting and no power under load. Some dealers don't seem to care how low the psi is as long as it is still running. If you run with low psi you will be giving your vp44 a slow and painful death. just my .02<br>wk

 

Be sure to take off your FP gauge before you go in. My dealer tried to void my warranty cause I had it on there. Only had 8 psi at idle. My thread is somewhere in the archives.

 

[undecided]called dealer today and he said he will look at it and if pressure is under 12 psi then they will replace it then .im just wondering where they will take their reading from?

 

If I'm correct, they take it from the port right by the VP44. If your looking at the fuel canister, the port farthest to the left is the one they take it from. At least they did on mine. But like I said, remove your FP gauge before you go.