At Idle i have 6k rail pressure,Unpluged FCA at idle and have 25k rail pressure,Reved up in neutral can hit 15K...
When I am On the road and floor it my rail pressure will drop to 3kpsi and the truck obviously has no power at 3k rail pressure... If I give it 1/2 throttle the rail pressure will come back up to around 15k..
All the boxes are unpluged

I have a steady 15psi supply to the cp3 the hole time..

 

So the rail pressure is dropping due to the heavy demand placed by the CP3. Have you checked the fuel filter? I see the 15psi pressure but is that pre or post filter?

MikeyB

 

do you have a big fuel line kit on? I wounder if you are getting plenty of pressure but not enough volume???

 

I have3/8" supply line and my supply readings are after the filters.. I have stock CP3 ,Flux 2,s and all my boxes are unhocked. I would think the stock cp3 could keep up with the flux2,s?

 

I spoke to John @ Floorit diesel about the injectors I ordered with the stock CP3.
He said that increasing LP pressure will help out too.

 

Thanks for the info,,,Maybe I will try to get a hold of floor it diesel and ask there advice.. Can anyone PM me there number.

 

I changed my cp3 out and the truck runs great..

gotta love the CR,s