These truly are the best even with the issue that arise with install. Fass sells a kit that i had to retrofit to flow better than what came in kit. My buddy and i own 3 rams one of which is an 03 ram cummins 3500 and it was the very first kit I was sent. This kit was purpose designed to use the original tiny lines off the tank fittings. And it was severely restricted making allot of cavitation noise... I honestly couldn't believe it. I had decided to order a dual feed/return sump that bolts to bottom of tank. and ran a 1/2" line return from pump to tank and a 5/8" supply to pump from tank of similar quality (blue 5/8" pushlock) . I was completely disappointed in the cost of this kit as it was a huge frustration researching a solution to get me back on the road as to what the best option would be "to help this pump out a bit" as it could not pull fuel volume it was designed to pull so this sump idea i ran across is what I went with. And was a success as the pump now out flows its rating. the 1/2 line that came in the kit had this rediculous silver quick connection that brought the 1/2" line SUPPLYING the fass down to just a hair smaller than a 1/4" inner diameter connection. This should NEVER be installed with a system that flows this much as it WILL reduce the life expectancy of the pump. Note: If you have a sending unit without a pump in tank "do not install this fitting for a supply to pump as it will cavitate. This literally seamed more of a band-aid or "cheap solution" to making the system "a kit" I got rid of that stupid fitting; probably cost me 15 bucks to include in the kit. Fast forward, you can tell the quality is right when you have a repeat customer dispight the trials spend upwards of $3000+ on these "kit's" w/upgrading them to bigger lines and having installed 3 fass system in all our trucks back to back they are the best insurance you can add to these trucks and I just think all fass systems 150lph and up should have 5/8 supply to them and a bolt on sump from the start...
I run a FASS 125 and a G&R Sump with the stand pipe and fuel return port on my 6.0. I couldn't be happier with both products, they work great together,
Ever since having mine installed on my lml duramax I swear mine sounds like it’s cavitating. My truck keeps going into reduce power mode and I can hear the engine starving for fuel so I have to let up on the pedal and then push it back down like it’s running out? I have also noticed that I have to be careful when I’m below a quarter of a tank almost like it’s not pulling fuel from that level.
We really appreciate you reaching out about the issues you are having and do apologize for all the trouble, sir! When you have a chance please reach out to our service team at 636-433-5410. They will be able to get this taken care of for you!
I installed a Fass system on my motorhome and I'm having issues with it. I use my factory fuel lines and attachment my Fass to it, took a while but I got it primed but when I turn the motorhome engine on (Cummins). I left my return line disconnected to see the return flow back to my tank and I'm getting 0, no fuel is being returned to the tank. in fact I can't even tell if the fass is even on when the engine is running. I think my vp44 is pulling the fuel through the fass system. When I prime it I hear it on and a little bit of fuel comes out from the return line but when the engine is on, 0 fuel comes out from the return line.
These truly are the best even with the issue that arise with install.
Fass sells a kit that i had to retrofit to flow better than what came in kit.
My buddy and i own 3 rams one of which is an 03 ram cummins 3500 and it was the very first kit I was sent. This kit was purpose designed to use the original tiny lines off the tank fittings. And it was severely restricted making allot of cavitation noise... I honestly couldn't believe it. I had decided to order a dual feed/return sump that bolts to bottom of tank. and ran a 1/2" line return from pump to tank and a 5/8" supply to pump from tank of similar quality (blue 5/8" pushlock) . I was completely disappointed in the cost of this kit as it was a huge frustration researching a solution to get me back on the road as to what the best option would be "to help this pump out a bit" as it could not pull fuel volume it was designed to pull so this sump idea i ran across is what I went with. And was a success as the pump now out flows its rating.
the 1/2 line that came in the kit had this rediculous silver quick connection that brought the 1/2" line SUPPLYING the fass down to just a hair smaller than a 1/4" inner diameter connection. This should NEVER be installed with a system that flows this much as it WILL reduce the life expectancy of the pump.
Note: If you have a sending unit without a pump in tank "do not install this fitting for a supply to pump as it will cavitate. This literally seamed more of a band-aid or "cheap solution" to making the system "a kit" I got rid of that stupid fitting; probably cost me 15 bucks to include in the kit.
Fast forward, you can tell the quality is right when you have a repeat customer dispight the trials spend upwards of $3000+ on these "kit's" w/upgrading them to bigger lines and having installed 3 fass system in all our trucks back to back they are the best insurance you can add to these trucks and I just think all fass systems 150lph and up should have 5/8 supply to them and a bolt on sump from the start...
I run a FASS 125 and a G&R Sump with the stand pipe and fuel return port on my 6.0. I couldn't be happier with both products, they work great together,
Ever since having mine installed on my lml duramax I swear mine sounds like it’s cavitating. My truck keeps going into reduce power mode and I can hear the engine starving for fuel so I have to let up on the pedal and then push it back down like it’s running out? I have also noticed that I have to be careful when I’m below a quarter of a tank almost like it’s not pulling fuel from that level.
We really appreciate you reaching out about the issues you are having and do apologize for all the trouble, sir! When you have a chance please reach out to our service team at 636-433-5410. They will be able to get this taken care of for you!
I installed a Fass system on my motorhome and I'm having issues with it.
I use my factory fuel lines and attachment my Fass to it, took a while but I got it primed but when I turn the motorhome engine on (Cummins).
I left my return line disconnected to see the return flow back to my tank and I'm getting 0, no fuel is being returned to the tank.
in fact I can't even tell if the fass is even on when the engine is running. I think my vp44 is pulling the fuel through the fass system.
When I prime it I hear it on and a little bit of fuel comes out from the return line but when the engine is on, 0 fuel comes out from the return line.