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so my lift pump is dying and it barely works at this point (the one mounted to the frame rail) is making some horrible noises like its getting caught up. im replacing it tomorrow but i dont know how this thing is still running without the pump working. no driveability issues what so ever.

my only guess is that the in tank fuel pump is working its *** of to supply the needed pressure. anyone else ever had this happen?
 

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Our trucks only have 1 pump, unless youve modified and added a sump pump or something of the sort. Also would be a great time to do the hutch and harpoon mod.

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^whs, your pump may not be holding pressure but you would know if it wasn't working pretty quickly.
 

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Have any way of watching your fuel pressure? That would be the easiest way to tell if your pump is getting weak, or your mixing valve in the tank is gunked up..

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OK I was under my truck today and noticed that thing you think is a pump also. If it's not a pump what is it and why does it have wires running to it?
 

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You have a sending unit and your fuel sensor on top of the tank, then on the frame rail, close to the transmission is your fuel pump.

There's not much else I can think of that has wires and resembles a fuel pump..

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You have a sending unit and your fuel sensor on top of the tank, then on the frame rail, close to the transmission is your fuel pump.

There's not much else I can think of that has wires and resembles a fuel pump..

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Thanks. I was thinking the pump was in the tank.
 

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Thanks. I was thinking the pump was in the tank.
No problem. I believe the obs had an in tank pump but not sure.

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