Fass louder

[CIverson]

I've had my FASS on for awhile now, and all of a sudden it seems to be alot louder. This just started this week, it still seems to work fine though. ANyone had this happen before? Wondering if something might be wrong with it, or if it's the new ULSD doing something to the pump.

 

[JLibert]

I was just noticing that my fass seemed to be louder than normal early this morning.

 

[CIverson]

I should add I have the 95gph standalone pump, adn I had insulated it from the body w/ foam tape. I could never hear it in the cab before w/ the engine running, but now I can. Foam is still intact.

 

[Tomeygun]

I should add I have the 95gph standalone pump, adn I had insulated it from the body w/ foam tape. I could never hear it in the cab before w/ the engine running, but now I can. Foam is still intact.

my pump only DPP/Fass pump was quite and with age got Louder (not older)...

 

[CIverson]

my pump only DPP/Fass pump was quite and with age got older...

Things tend to do that



I'm assuming you meant louder. However mine was not a gradual thing. One day I didn't notice it at all, and the next I do.

 

[Tomeygun]

Things tend to do that



I'm assuming you meant louder. However mine was not a gradual thing. One day I didn't notice it at all, and the next I do.

evidently I am getting older... geez...

Your correct, I meant louder...



Man O man... . :-laf

 

[staarma]

How long have you had it on there? My first winter with my FASS was a little weird for me. The pump changes pitch and gets louder and quieter with the heater grids cycling on and off.



The only other thing to think about is a restriction on the pickup tube or supply line. That would make it wine.

 

[rbattelle]

At the risk of writing it off, I notice my fuel pump (Holley Blue) is a lot louder in cold weather. The weather has recently grown cold, and that may explain the increase in volume.



Staarma - any fuel pump will change pitch like that with the heater grids. My fuel pressure also fluctuates. This is because the heater grids draw a TON of current. If you look carefully, you'll notice all the lights on the truck dim when the grids are on too.



Ryan

 

[tom sweeney]

i have BOTH FASS pumps,the new electric,and older brush motor,the brush motor seemed louder when new,i couldn't notice it while driving,only at idle while standing outside... . same with the new elec. pump.

i think the brush motor actually got quieter as the brushes wore in... not unusual i guess... for me me,noise or no noise... . its the best pump IMHO... . (for me anyway!!!)... tom

 

[CIverson]

How long have you had it on there? My first winter with my FASS was a little weird for me. The pump changes pitch and gets louder and quieter with the heater grids cycling on and off.



The only other thing to think about is a restriction on the pickup tube or supply line. That would make it wine.

I put in on the summer or fall of '04 IIRC. Never noticed it last winter, and the temps have been pretty steady for the past few weeks here.



I'll have to check for a possible restriction, fuel filter is new, but I may have gotten a bad batch of fuel somewhere.

 

[staarma]

Staarma - any fuel pump will change pitch like that with the heater grids. My fuel pressure also fluctuates. This is because the heater grids draw a TON of current. If you look carefully, you'll notice all the lights on the truck dim when the grids are on too.



Ryan

I think everyone knows about the heater grids and dimming lights but not everyone has experience with the FASS pump. I was just not ruling out something that simple is all. Sometimes people overlook the basics when troubleshooting.

 

[rbattelle]

I think everyone knows about the heater grids and dimming lights but not everyone has experience with the FASS pump. I was just not ruling out something that simple is all. Sometimes people overlook the basics when troubleshooting.

Oh, I misunderstood you. I thought you were saying you were afraid there was something wrong with your pump. My mistake.



Ryan

 

[staarma]

Oh, I misunderstood you. I thought you were saying you were afraid there was something wrong with your pump. My mistake.



Ryan

No mistake at all. I'm gald you pointed out the fact that the heater grid is what actually pulls the power down and causes the voltage drop which in turn can make any pump/motor change pitch. My post wasn't that clear on why.