Fass Installed

[Artman1]

Well finally got the Fass installed. Very quiet and great fuel press. 17lbs. at idle. Can not pull it down past 14lbs at wot. Best investment you can make from my point of view. Wish I would of done this a couple years ago. Another happy Fass customer.



Diesel-Dan thank you for all your help and tips.

 

[LowFly]

No prob! Thanks for the kind words and glad its doing it job for ya! Oo.



Glad you cant hear it! haha... .

 

[MHoverson]

Well finally got the Fass installed. Very quiet and great fuel press. 17lbs. at idle. Can not pull it down past 14lbs at wot. Best investment you can make from my point of view. Wish I would of done this a couple years ago. Another happy Fass customer.

I installed the same pump a week ago and I'm not getting anywhere near the pressure you are. Where are you measuring the pressure at? My gauge reads pressure between the factory filter and the injection pump.

The highest pressure I've seen is 9 psi, most of the time it sits at 7 psi. In the past couple days it hasn't gotten above 5psi.

I did the 5 gallon bucket test today and it didn't change.



I'm running out of things to look at.

 

[Artman1]

My gauge reads pressure at the fuel filter. There is a tap on the bottom of the filter housing.



Pressure has changed a little bit. 17lbs. at idle Can now pull down to 12 or 13 lbs. But returns to around 14 at cruising speed.





I think a lot of my problem now is the transmission. It goes in on Monday for a rebuild.

 

[JVolpe]

My FASS 150/95 has been installed for over a year and a half. Very quiet and performed perfectly so far. My electric fuel pressure gauge is T'd into the fuel line from the FASS to the CP3 at about the firewall. I bypassed the stock filter altogether. My fuel pressure has been 17-18psi at idle since installed. I can pull it down to around 13psi with the boxes turned up to 500+hp at WOT throttle but never seen it go below that.

 

[Dieselhed]

We will all keep our fingers crossed for you FASS owners.....

 

[JVolpe]

We will all keep our fingers crossed for you FASS owners.....

Thanks, I need all the help and luck I can get, no matter where it comes from .

 

[LowFly]

I installed the same pump a week ago and I'm not getting anywhere near the pressure you are. Where are you measuring the pressure at? My gauge reads pressure between the factory filter and the injection pump.

The highest pressure I've seen is 9 psi, most of the time it sits at 7 psi. In the past couple days it hasn't gotten above 5psi.

I did the 5 gallon bucket test today and it didn't change.



I'm running out of things to look at.

Have you confirmed you Gauge is reading correctly? I see this one a lot. If you have an isolator, you might need to rebleed it.

 

[MHoverson]

Have you confirmed you Gauge is reading correctly? I see this one a lot. If you have an isolator, you might need to rebleed it.

I just went out and bled the isolator line and it didn't change the reading. I was pretty sure the gauge was correct but it doesn't hurt to check anyway.



I got a hold of the place I bought it from today so I'll see what I can do there.



I was surprised that it didn't draw fuel out of the external container I had when I did the 5Gal bucket test. At 95 gph I would have thought the fuel level would drop pretty quick. I even tried placing the fuel above the pump so gravity would help but the presure never did come up.



Through all of this the pump has had the sound of a squeeling bearing. I read where that might be a sign of cavitation but it didn't change even when I had the fuel source above the pump. It should have had no cavatation problem then.



You should be getting my warranty paperwork in the next couple days. I sent it early last week. I have pump #6033.



If you have any other suggestions please feel free to pass them along.



Mark

 

[LowFly]

I just went out and bled the isolator line and it didn't change the reading. I was pretty sure the gauge was correct but it doesn't hurt to check anyway.



I got a hold of the place I bought it from today so I'll see what I can do there.



I was surprised that it didn't draw fuel out of the external container I had when I did the 5Gal bucket test. At 95 gph I would have thought the fuel level would drop pretty quick. I even tried placing the fuel above the pump so gravity would help but the presure never did come up.



Through all of this the pump has had the sound of a squeeling bearing. I read where that might be a sign of cavitation but it didn't change even when I had the fuel source above the pump. It should have had no cavatation problem then.



You should be getting my warranty paperwork in the next couple days. I sent it early last week. I have pump #6033.



If you have any other suggestions please feel free to pass them along.



Mark

Mark,



Talked to your dealer this morn. Do me a fav and check the coolant/Gauge side of the isolator. Make sure you don’t have a big air pocket there as well. I really hate to beat this isolator to death…but like I said…I see a lot cause issue.



That squealing is the by-pass ball resonating... . which it would only do if you were at 18 PSI where the pump is set up to dead head at. While the squealing should not be happening, it’s not hurting anything. What most have told me is when the spring breaks in, it will stop. We do everything on our end to not let them go out like that and a simple spring and ball change is usually what is needed to fix the issue. I feel you are getting correct pressure on this pump.



The HPFP is a static flow pump. Meaning that it will not move huge volumes of fuel all the time like the FASS. It’s set up to only push what fuel is needed at the time of demand. SO you will not empty the bucket out that you were testing with. This is normal.

 

[MHoverson]

Mark,



Talked to your dealer this morn. Do me a fav and check the coolant/Gauge side of the isolator. Make sure you don’t have a big air pocket there as well. I really hate to beat this isolator to death…but like I said…I see a lot cause issue.



That squealing is the by-pass ball resonating... . which it would only do if you were at 18 PSI where the pump is set up to dead head at. While the squealing should not be happening, it’s not hurting anything. What most have told me is when the spring breaks in, it will stop. We do everything on our end to not let them go out like that and a simple spring and ball change is usually what is needed to fix the issue. I feel you are getting correct pressure on this pump.



The HPFP is a static flow pump. Meaning that it will not move huge volumes of fuel all the time like the FASS. It’s set up to only push what fuel is needed at the time of demand. SO you will not empty the bucket out that you were testing with. This is normal.

Dan



You can say "I told you so". I checked the coolant/gauge side of the isolator

and made sure it was as full of coolant as possible and then rebled the fuel side.

Now I have between 16 and 17 psi at idle. Life is good.



Thanks for the help.

 

[LowFly]

Dan



You can say "I told you so". I checked the coolant/gauge side of the isolator

and made sure it was as full of coolant as possible and then rebled the fuel side.

Now I have between 16 and 17 psi at idle. Life is good.



Thanks for the help.

GOOD! Glad it was an easy fix! I have been down this road a few times before!