danshsss

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..

MikeyB

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

53 willys

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

danshsss

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?

DR3500

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.

danshsss

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.

danshsss

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

gotta love the CR,s