ditto...if you look at the drivers side of your block, is there a lift pump there? if not, then there's a good chance that your lift pump is in the tank, in which case you need to go draw straw, or get the module to replace your in tank pump...

 

The in-tank pump is a flow-through design.

 

not very well though...........very restrictive

here is some good info on the intank pump


https://www.dieselbombers.com/5-9l-2...dont-walk.html

 

Mine flows pretty good. I can run with it disconnected using my helper pump and maintain 5psi through a dead in-tank lift pump.

 

helper pump?..........please explain

 

It's a Walbro FRB-22, 10psi, 40GPH, inline ahead of the stock pump/tank. It's normally switched off:

http://stuff.is-a-geek.net/PhotoAlbu...ics/CRD_27.JPG

I can't figure out why you need all that pressure and GPH. It's just pumping 99% of the fuel back into the tank through the regulator. My truck burns less than 4 gallons/hr. at cruise and needs some more for cooling/return flow. The CP3 needs positive pressure at the inlet, that's it. I run a helper pump as a backup, to help when it gets really cold and to potentially support additional fueling mods. Someday, maybe.

 

[QUOTE=NadirPoint;477323]I can't figure out why you need all that pressure and GPH. It's just pumping 99% of the fuel back into the tank through the regulator. QUOTE]

80% actually is what it is ^^^^^


A CP3 doesnt need near the flow for cooling and lubricity as a VP-44 does

 

As long as you maintain a certain inlet pressure it will use whatever it can flow for the engine and self-cooling. What's the 80% excess pumping capacity for?

 

80% excess flow is for cooling and lubricity of the pump......its paramount for the VP, not so bad for the CP3 since it has no electrical components in there

 

Thanks guys... I was really startin to get pissed when the raptor wouldn't work... Finally figured out it does the in-tank pump... I can't believe the guy I bought it from was dumb enough to get a replacment pump from the dealer...
Anyway it was very simple to fix cause the bed was off so I could repaint it... I actually just pulled the hose off the inside and put a piece of 3/8 rubber hose down to the bottom of the tank beside the big dumb plastic piece that's in there... I left all the connections on top outside the tank just like they were... Will just have to be careful not to get below about an 1/8th tank or so... Go around a corner or something and it sucks air...
Has been working great!!! 17 psi at idle and 14 at WOT.