lift pump troubles p0088 & p0628

im am having lift pump trouble . the codes i get are p0088 and p0628. according to the code scout its fuel rail pressure to high and low voltage on the lift pump. now the problem i have is where the *%$! is the lift pump in tank or out and is it in the engine compt. or at the tank all my buddies have different opinions. my truck acts as if it is not getting fuel and/or running on 3 or 4 cyl. then it will quit for a while and be fine. i would like to fix this my self and not have to pay the dealership gobs of money to diagnose the problem and fix it. oh yeah i have replaced a fuel pump near the tank and the one i took out was aftermarket. since then my fuel guage will go from having fuel to showing empty and a warning light and bell going off. i think its got gremilins in the wiring.  

what year is your truck  
02 2500 cummins:edge juice with attitude,4 in exhaust, bullydog intake,Fass 150 lift pump
94 2500 cummins:bully dog air intake,4in exhaust,and hopefully #8 fuel plate

it should be right behind  the fuel filter canister attached to it up to the05 after that its in the tank  
I burn more diesel and run more miles in a week the most of you people do in a month. ctds that have been used 97 3500, 98.5 3500, 98.5 3500,01 3500, 03 3500. those that are being used 06 3500, 07 3500. and yea these trucks earn their living

ok thanks havent had much time lately to respond back. i have located the lift pump and plan to tackle it this weekend. ive been reading that this could lead to injector pump failure is this true. also ive got more new codes p0462-p0463-p0148 what are they for and can it be delt with with out the dealership  

yes it is true it will screw the injector pump because it is not getting any fuel  
02 2500 cummins:edge juice with attitude,4 in exhaust, bullydog intake,Fass 150 lift pump
94 2500 cummins:bully dog air intake,4in exhaust,and hopefully #8 fuel plate

the injector pump failure is on the vp-44 on the 02 or older the cp-3 is different and usaully will not run at all  
I burn more diesel and run more miles in a week the most of you people do in a month. ctds that have been used 97 3500, 98.5 3500, 98.5 3500,01 3500, 03 3500. those that are being used 06 3500, 07 3500. and yea these trucks earn their living

could this be from a bad sensor or something causing the computer to change the way the cummins runs. its fine and all the sudded it will start doing that again for a day then stop and be fine for 2 or more weeks. it has had or still does have programing in it and i wonder if that has any thing to do with it.  
2004.5 3500 4x4 K&N cold air intake 5" custome exaust 35-12.50-18 nittos and mickey t's 18x10 wheels

its possible that the programer has something to do with it  
I burn more diesel and run more miles in a week the most of you people do in a month. ctds that have been used 97 3500, 98.5 3500, 98.5 3500,01 3500, 03 3500. those that are being used 06 3500, 07 3500. and yea these trucks earn their living

i never seen what year your truck is, and would also need to know what all is done to the truck to better help ya out  
biged681985

99 dodge 2500 12 valve
bombs-no plate, 3200 gsk., straight pipe into 6 inch tip, s&b intake, goerends TC and VB, back woods bumper. 281 hp and 807lbs of tq. dyno sheet to prove. www.dieselbombers.com

its an 04.5 and before i got it it looks to have had some type fuel pump installed, itnake, possibly propane injection, a programer, 5" stack in the bed, and maybe other stuff too, that i am not able to see. but all that was taken off before i got it it only had 58k miles on the display too. it now has a k&n itnke and filter and 5" exaust out the rear and a small in line fuel pump near the fuel tank, i have replaced it with a new one 2 weeks ago. i wish i could find the original owner and find out just what was done with it and what it was used for cause, i bought it to pull my tractor and dozer and with 4.10 gears and 48re trans. it doesnt pull as good as my old 90 model f 250 7.3, and that just aint rite. my father in law has a 01 3500 with the same set up as mine and it will out pull it all day long but he cant touch me on the race track.  

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looks to have had some type fuel pump installed



Can you be more descriptive of what this pump looks like?

I would just bite the bullet and install a FASS system and be done with it.

I strongly urge you change that K & N to something else like maybe an AFE.  Cummins and K & N don't like each other.  It's rumored Dodge will not warranty a diesel with a K & N also.  Not that it applies to you, but from experience, I had an K & N chew up my impellers on my 04.  in 20,000 miles too.  Just my .02  
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08 Dodge 6.7 2500.  AFE intake, BD intercooler, Shibby Engineering Stage 1 Air Horn and boost tube, XRT, the exhaust fell off, what EGR?, Air Dog, 3.42 Gears( I changed them), Flex-a-lite electric fans, Twin air compressors, Air Bags, Rear Sway Bar, Front hitch, Stock Height Firestones. 23.5 MPG Hwy  18 with 10K Tag Along.  That's my daily.  I can tell you about the other 9 I have.

it has a in line fuel pump that came from advanced auto parts about 3 in. long and 2 in. in diameter and the pressure on it is from 3 to 6 psi. the one installed by the other owner was taken off but the mount bracket was left on. a buddy has the fass and the bracket looks the same on his, thats why i know it had a fuel pump like that at one time.  

oh i didnt mention that i am putting banks ram air on in place of the K&N. i dont like the K&N because it pulls air from the engine compt, and its a pain to get back together after cleaning.  

you can run a holley blue  i did that to 2 of mine its a lot cheaper and gives good results, cost about 200 after extra parts  
I burn more diesel and run more miles in a week the most of you people do in a month. ctds that have been used 97 3500, 98.5 3500, 98.5 3500,01 3500, 03 3500. those that are being used 06 3500, 07 3500. and yea these trucks earn their living

I think you need more like 12 PSI for the CP3.  I forget.  The 6.7 needs 15.  But it's not just the pressure, it's the volume also.  It sounds like you have a gasser pump on there.  It neither has enough pressure or volume.

Not trying to stomp on any toes. . .  You might be best to go with a pump made for the application.  That's why I suggested the FASS  
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08 Dodge 6.7 2500.  AFE intake, BD intercooler, Shibby Engineering Stage 1 Air Horn and boost tube, XRT, the exhaust fell off, what EGR?, Air Dog, 3.42 Gears( I changed them), Flex-a-lite electric fans, Twin air compressors, Air Bags, Rear Sway Bar, Front hitch, Stock Height Firestones. 23.5 MPG Hwy  18 with 10K Tag Along.  That's my daily.  I can tell you about the other 9 I have.