Dodge Diesel - Diesel Truck Resource Forums

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- 3rd Gen High Performance and Accessories (5.9L Only) (https://www.dieseltruckresource.com/forums/3rd-gen-high-performance-accessories-5-9l-only-107/)

- - Adjust Fass Pressure (https://www.dieseltruckresource.com/forums/3rd-gen-high-performance-accessories-5-9l-only-107/adjust-fass-pressure-200770/)

Cummins610

04-13-2008 12:54 AM

Adjust Fass Pressure

I got a fass 150/150,it idles at 16PSI and I can bring it down to 9 PSI. How can i make it around 20+. (readings at the CP3)

53 willys

04-13-2008 01:25 AM

pretty sure you can get a new spring or a shim pack from your FASS dealer to adjust the PSI:cool:

bluechrome

04-13-2008 07:09 AM

Just pull the spring from the return line and physically strech it. I'm making 20psi with mine

tristan21

04-13-2008 02:56 PM

I thought a shim kit was needed. Was that a trial and error "stretch"?

rjm022

04-13-2008 04:33 PM

i replaced my spring to get my psi up to 21. i installed the shim kit too- that just reduces the noise of the fass pump a little.

Cummins610

04-13-2008 06:13 PM

Where is the spring and where can I get a shim kit?

rjm022

04-13-2008 08:51 PM

contact member-diesel dan. he'll set you up. shim kit and spring cost me 15.00

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