Fass Owners I Need Advice.
 

Ok this is hard one to explain! I just want to know if it is normal. Ok when you first turn the key on you here the pump run its one steady sound then when you start the truck it gets a little bit diff in sound but when i am driving i dont here it do to the stacks on the tuck but when i come to a red light stop sign or sit and ideal i hear the pump make its normal sound but then it changes a little in the sound then right back to the normal sound and it keeps doing that its like 2 tones of sound back and forth real fast. The truck runs great so far and i only have had this in for a few months and i dont remember it doing this but not sure. thanks all mine is on a 04.5 ram cummins.:c:

What does your fuel pressure guage say?

May be air in the system

:w2: says 0 its still in the box have not hooked it up yet. My bad. But the truck runs great even on the hot setting.why?

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if its air i should be able to open the the one filter and just fuel comes out.

Ive heard about every pump change its tone when it wants to I wouldnt worry about it

Ya i have not heard anyone elses yet. it almost sounds like it builds up and then lets go maybe its the fuel returning to the tank.

I dont think this is anything major to worry about either...but I would get the FP guage hooked up. Its a great troubleshooting tool.

Ya i plain on doing that this weekend. But everyone is telling me the common rail i should get the rail presure gauge instead. what kind of numbers should the fuel presure gauge read too.

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ya and these pumps sure are not quiet wow.:pca1:

The pressure gauge is as said a great tool but I'll tell you what I know about the FASS products.

1. the tone will change based on the quality and age of the filters.
2. the tone will change if there is air locked in the pump.
3. the tone will change if your tank is very low or the stock dip tube still has the screen on the end of it and it is getting plugged.
4. the tone will change if you have a hole on the section side

Nothing to be really worried about though.

The Noisy Pumps are miss aligned Gears in the Pump

rail pressure gauges are required only if you are putting a timing and duration prorgam on the truck that raises the rail pressure. I don't know if the edge does that to be honest but I'm not sure you need one either.

thanks for the list of things to check. Should i remove the stock screen in the tank on the tube?

see your PM's but only do that if you trust your fuel source as per my notes to you. if you go to unfamiliar stations leave it on.

Ya i better leave it on then. i sent you another pm thanks wyatt

got it. can you record the sound it makes and send me a MP3 file or something? I don't really know what it is if that is how you describe it.

your other option is contact the company you bought it from to get a replacement if it is faulty.:pca1:

Hey how about i call you from a cell phone?

Something to also keep in mind is that an aftermarket lift pump system will fluctuate in tone when you have something draw current on your electrical system.

That a good answer there i wounder what would cause that it is hooked to the same battery as my amp hummmm

Well you didn't say that there smart ass.

My guess is that you have a bad ground somewhere then. All your grounds or neg's are they body grounds or terminal post grounds? If they are body grounds, take them all off and make them all battery post grounds, you will be much, much happier.

Check all the posts for fit and finish and clean them up (12V+) and you should take care of the noise just by doing that.

Completely Normal!
Also , Just read one of the other post, These pumps need to have a relay and hotwire to the battery!

why did you call me a smart ass lol your answers so far are all good too gees.
and what do they mean i need to have a relay it is hooked to my battery and it came with a relay. gees i am getting confused again:argh: So even the edge should be grounded to the battry not the fender well.

Then an Electrical Draw shouldnt be the reason of your sound.
I would consider it normal. All the Fass pumps make a sound thats similar to cavitation, Its common to the gearator type.

:tttt: I thought it was a pump problem. But it might be electrical. Different issue entirely. The unit should come complete with a relay and a fuse on the harness. If it didn't contact your supplier for the goods but since you have that you don't need another one.

What you need to do is look at your power lines and ground lines. Running these to the -12V and +12V is the only way it should be done. Of course that's from a guy that has replaced all his body grounds...:ouch:

OK then let me see what i need to do here. Ya i heard alot of people saying i should have my edge hooked to the negitive side of the battery to ground it. and the pump i am going to check all the conections and i guess it is normal i will post back soon and wyatt if you want me to call ya i will i dont want to rack your cell bill upif you want me to i will tomorrow pm me your # if you dont mind me calling you:c:

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well to make this easy it sounds like it gets a little louder then a little less loud . only when the truck has been running. it is a steady sound when i turn the key on to start and when i first leave and then when i have driven a little bit then i stop and i hear the pump make the 2 diff noises right after each other like it cycles the 2 noises. thats is the best way i can discrbe it lol:run::w2:

Maybe your intake heaters cycling and causing a amp change

my pump does the same thing when i come to a stop i have the new pickup tube in mine so ive always thought it was just from the fuel sloshing from the stop and the pump was sucking a little air too, i wouldnt worry about this the pumps make all kinds of different noises:humm:

Chad do you really think that would happen this time a year?:w2:

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you've got mail:U:

My intake heaters cycle when the engine is below operating temperature reguardless of out side temperature

IIRC they cycle regardless of temp for 10-20 seconds

Do your headlights dim when the pump changes its tone?

I drove it home last night in the dark and dash lights and headlights all seem fine. The truck runs great. Just a tone thats gets diff and back to same at times when stoped not even all the time. I did sit at a light and rev the truck a little higher rpms sitting there between the noise of the stacks:argh: it seems like the pump gets a stady tone then.:humm: