i have a 02 cummins that in the last 6 months been through 2 lift pumps, anyone got any ideas on what might be causing this problem. im about to have to put another lift pump on and i want to make it the last one.

 

Are you installing the intank pumps? or the one that is on the side of the engine that they supposedly don't make anymore. But i have heard that Carter makes them..
Sounds like you need a upgrade to a Fass or a airdog.. they are pricey but well worth it.. I bought a Fass 150 I never looked back Great pump...

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i was going to go to a fass pump, this is the external elec pump. oh and it also surges around 60 on long trips, and it has a rebuilt vp44?

 

I'd get a Fass or a Air dog.. coal train over at Doghousediesel.com does a great deal on these.. if interested hit him up for Price...
And for the surges at 60 hummm Any codes? with or with out Cruise control on? What is your Fuel pressure? has it ever been below then 4psi with your new VP44?

 

gauge shows from 6 to 14psi never below 5, but not sure gauge is correct, came with truck. no codes yet

 

sorry for the long pause in my reply here 61 hours logged in at work last week.. But 14 psi not bad. 6 psi part eek lift pump should help out..
and the surging at 60mph may have a bad spot in the AAPS.. something worth looking into little testing would be involved.. But if you have access to a high end scanner you can look and see what the AAPS is reading and freeze frame it. And go back to see what is going on with your desk top... Might be able to figure out what is going wrong..