Frequency of filter changes on the FASS?

[steved]

So what is an OK frequency for changing the FASS filter?



I have around 25k on the current HF6604 (3 micron)... still holding good pressure, doesn't cause the low pressure light to come on... But I have drained quite a bit of junk out of the separator (meaning if it is in big chunks, it is in small chunks too!)



How many miles is everyone else putting on these before they change them out??



steved

 

[JVolpe]

I think the manual suggested 30,000. I changed mine around 22,000 and used the Fleetguard HF6604 3 micron filter also. I plan on changing every 25k or before if fuel pressure drops or starts to vary much from normal.

 

[John]

One thing I am trying to understand about my FASS system...



Is there ANY need for ANY sort of pre-filter before the fuel supply enters the FASS system? Meaning, IF I remove the OE fuel module screens and use a -08 A/N pickup with no sort of pre-filter, does the FASS adequately filter out all the junk in either the fuel filter or separator before going through the air separation portion of the system?



Or, is it best to use a pre-filtering system of some sort?

 

[steved]

One thing I am trying to understand about my FASS system...



Is there ANY need for ANY sort of pre-filter before the fuel supply enters the FASS system? Meaning, IF I remove the OE fuel module screens and use a -08 A/N pickup with no sort of pre-filter, does the FASS adequately filter out all the junk in either the fuel filter or separator before going through the air separation portion of the system?



Or, is it best to use a pre-filtering system of some sort?

The fuel is pulled through the fuel/water separator before the pump... that is a 144 micron screen. So the water separator should catch anything that you pull from the tank. This is the FASS, and not the FASS II Pump only...



I guess I'll wait until 30k... I haven't seen any sort of pressure drop.



steved

 

[John]

Thanks for the info Steve.



I did some serious looking and found a great spot to mount my System 1 fuel filter (30 micron, s/s screen mesh filter media). This will be my pre-filter for my FASS system.



And yes, I have the FASS ( ) not just the pump ( ).

 

[steved]

Thanks for the info Steve.



I did some serious looking and found a great spot to mount my System 1 fuel filter (30 micron, s/s screen mesh filter media). This will be my pre-filter for my FASS system.



And yes, I have the FASS ( ) not just the pump ( ).

I wouldn't even bother... I am running the FASS alone and the water separator pulls a bunch of crap out... doesn't seem to be affected by even sand.



steved

 

[John]

But...



I'm not in any way using the OE fuel module filtering media (e. g. , screens), to filter the supply side of my new system. In fact, the only thing I'm using the OE fuel module for is a mounting location for the fuel level sending unit. That, and a mounting system for my new supply and return hardware.



In other words, the OE module is sort of a 'host'...



like on Aliens.

 

[ROADWARRIOR]

I'm not using any sort of prefilter between my 1/2" stand pipe and the FASS. I was told I did not have to by the dealer and I was also told the fuel went through both filters before it enters the pump.



Dan

 

[steved]

But...



I'm not in any way using the OE fuel module filtering media (e. g. , screens), to filter the supply side of my new system. In fact, the only thing I'm using the OE fuel module for is a mounting location for the fuel level sending unit. That, and a mounting system for my new supply and return hardware.



In other words, the OE module is sort of a 'host'...



like on Aliens.

Shouldn't matter... anything large enough to get sucked into the line will get caught in the pre-screen/water separator... the FASS is set-up: Tank - water separator/screen - pump - main filter - engine. Anything you pull out of the tank will get caught in the screen prior to ever seeing the pump... a 144 micron screen is still pretty small.



steved

 

[LowFly]

We get reports from guys that run the filters 90,000 plus with no issue. Just drain you WS every other fill up. I will say that you could go 60,000 pretty easy. Just watch you gauge.



The WS will knock down any big chunks... anything smaller than 144 should be fine to pass through the motor. If the rare occasion occurs that the motor should jam with debris, you can loosen up the 4 bolts on the T-block to motor base. This will allow movement for the gear to pass the debris into the filter. BUT we really only see this with freshly installed HPFP pump (Debris from cut lines and such... . always flush the lines before install!). Not much of an issue with the FASS.

 

[LowFly]

Dan, (diesel dan)



Steved, please forgive me for hijacking your post but since this is Dan's latest reply, I wanted to run this by him.



Took the truck to the dealer for the latest TSB for smoke on intial start. Mechanic hook up the OBD and retreived the Vin # and then hooked up with Star for the latest updates pretaining to my Vin #. After downloading all updates, now when you turn the ignition on, my fuel pressure (have gauge) with go to almost 10 psi and stay there for approx. 25 seconds (just like you bump the starter and no start) and then falls to zero. "No more", when you turn the ignition on the pump will run approx. 1-2 seconds and shut off. Dodge (mechanic) wanted to drop the tank and put the in tank fuel pump but I told him I was going with the fass system. I presume I got the in tank (pump) software with the fuel pressure as noted above or the hard start software or both (who knows). Truck starts good with the above fuel pressures. Haven't put the fass system on, waiting on a replacement tank from transfer flow. My question: do you foresee any problems with starting with the fass system with the describe fuel pressures noted above. Thanks for your time.

Well, you should have the Fuel Filter Mounted Fuel pump. You can check this very easily. As for the pressure, the FASS should be apples to oranges to the stock. The FASS usally makes pressure faster than the stocker, so you may get some differant numbers. Hard start issue due to pressure should not be an issue for your truck. That is a VP-44 (2nd gen) thing. I believe that Dodge made the pump actually run longer on your year to combat the hard starts these trucks have. The FASS should work perfect with this flash.

 

[John]

(Debris from cut lines and such... . always flush the lines before install!).

As I've been making my own Aeroquip AQP and TRH braided stainless steel hoses for every hot rod project I've worked on for well over 30 years now, I'm well versed in all the tricks of the trade. It does take time to perform all the necessary steps to fabricate quality hoses but doing it right the first time is the ONLY way to go (IMO).



And yes, EVERY hose surrounding my FASS system (or anything else on my Ram for that matter), has either Aeroquip AQP or TRH hose/fittings.



Including my boost and fuel pressure gauges (Aeroquip TRH w. s/s fittings! :--) ).

 

[steved]

http://cgi.ebay.com/ebaymotors/GENU...tegoryZ33661QQihZ011QQitemZ320012950547QQrdZ1



Here are 2 micron Fleetguard filters that would replace the current FASS water separator... . Just FYI... sorta like the Racor idea of a better filtration...



steved

 

[LowFly]

http://cgi.ebay.com/ebaymotors/GENU...tegoryZ33661QQihZ011QQitemZ320012950547QQrdZ1



Here are 2 micron Fleetguard filters that would replace the current FASS water separator... . Just FYI... sorta like the Racor idea of a better filtration...



steved

I would highly recommend not running a 2 micron filter on the water sep side. This is the suction side of the pump and we have had a few issues with people cavatating due to the restriction that this filter adds. Hence the 140 Micron water sep we use.

 

[steved]

I would highly recommend not running a 2 micron filter on the water sep side. This is the suction side of the pump and we have had a few issues with people cavatating due to the restriction that this filter adds. Hence the 140 Micron water sep we use.

What you recommend and what people actually do are sometimes two different things... :-laf



steved

 

[LowFly]

What you recommend and what people actually do are sometimes two different things... :-laf



steved

Very true!



I'm not saying that it wont work to an extent... . but the more the filter plugs... . the more cavitation you will experience. I can promise you that the pump will be noisier. Not to mention that I had someone put an HPFP with the 95 GPH pump and EM-1002 motor (Our most Strongest/durable combo for thick fuel or high pressure) post 2 micron filter on a WVO/Diesel Setup. They could not get the pressure above 8 PSI on Diesel and 4 PSI on WVO. WOT runs, they could suck it down to 0. Pump was very noisy. They moved it pre-filter, and pressure went back up to 18-20 PSI where they wanted it. All readings were measured at the IP inlet.

 

[DLBurns]

Dan,

My FASS pump is extremely noisy, if you stand near the tailgate of the truck it sounds as if it is going to come up through the bed! I have never changed the filter or drained the water seperator, I have about 20K miles on the FASS system and my FP stays right at 15 PSI. I am very pleased with the great FP and if I have to live with the noise it is no big deal. Any ideas on what could be causing all the noise?

TIA

Dave

 

[steved]

Dan,

My FASS pump is extremely noisy, if you stand near the tailgate of the truck it sounds as if it is going to come up through the bed! I have never changed the filter or drained the water seperator, I have about 20K miles on the FASS system and my FP stays right at 15 PSI. I am very pleased with the great FP and if I have to live with the noise it is no big deal. Any ideas on what could be causing all the noise?

TIA

Dave

First, not draining your water separator is just stupid... I suppose you would blame the FASS if you sucked a bunch of water into the IP?



I found part of my noise was due to the restriction of fuel coming from the tank... I tweaked the FASS's supplied connector (drilled it out to max) and it quieted down...



I have also put over 30k on my FASS (really didn't know this until I looked the other day)... it is a lot quieter now than when I first put it on... must need a "wear-in" time...



steved

 

[LowFly]

Check out the link in my sig to the trouble shooting manual. It gives an outline for a noisey pump. Try the 5 gallon bucket test in there. If the noise goes away while sucking from the bucket, you may have a intank restriction. ALSO just because you only have 20K on your filters doesnt mean that you might have gotten a bad tank of fuel with a bunch of sediment in it. I would definatly change the Fuel filter and clean the water sep... . look inside of the fitler to see if you have a build up of junk at the bottom. You could also be getting water at fill up as well... . this is why its a good idea to open the drain for a bit on the WS every other fill up. [URL=https://www.amazon.com/s/ref=as_li_ss_tl?url=search-alias=automotive&field-keywords=Frequency+filter+FASS+&linkCode=ll2&tag=|Frequency filter FASS]#ad

 

[DLBurns]

First, not draining your water separator is just stupid... I suppose you would blame the FASS if you sucked a bunch of water into the IP?



I didn't say that I was blaming anything on the FASS, all I was looking for was some direction on what might be causing the noise, which I got from Dan.

You response was a lot of help though