I Am Looking At The Fass Pump And Filter Setup. I See That They Have 2 Set Ups: 1 Is 95gph And 1 Is 150gph. Is It Necessary To Run The Larger Unit When Stacking Boxes On The Lb7? Any Problems Going With The Bigger Unit When Not Running Boxes Stacked?

Thanks.

Go as big as u can the first time, if u can afford it.

We dont chagre a different price for the two kits they are the same money

when i installed my 95 gph pump i had problems , set SES codes fuelrail pressure was out of wack, pilot injection was loud it was doing this while coasting to stops, tunes or no tunes it seems it was to much pressure they sent me new springs but they were the same ones so it sits on the bench i believe its too much pressure and there is no return, bypass , or regulator.

I have a buddy running a FASS on his 05 with out any issues.

Bigd give Brad a call 636 742 3100 I am sure he will fix any issue you have with it if where you bought it wont.

Hey Newbie to the forum here.

Can any one explaine the benefits of a FASS as obviouse as it may seem. I just want to make sure I am understanding the benfits correctly. Perhaps there is a FAQ already?

Thanks

.

Bigd give Brad a call 636 742 3100 I am sure he will fix any issue you have with it if where you bought it wont.
brad and the rest of the folks at FASS have been more than helpful and continue to be so.

I have the Air Dog and I have similar expeirences as BIGD.


The code set is a P089...which is fuel rail pressue too high.

My truck does only it when cold when you start up. Now the reason for it doing while coasting is because the flow of fuel shuts off when you coast down a hill or at a stop...yet the pressure actually builds..which then sets the code. Once the fuel temp is above 95F it goes away in my truck.

I purchased from John Kennedy the fuel guage for the test port(nice guage) and it is showing 11psi....too high(This is after my filter losses which I estimate at 2psi)

I had a new pump sent to me that should read about 8psi at the test port(10psi at the output of the pump)..this should(hopefully) fix the problem.

I am going to install it and see this weekend.

if i run more than 9 psi i set the FRP code as well...

yep thats the code i was getting, how do you feel about the pilot injection (at least this is what i think it is)does your trucks behave the same,

if i run more than 9 psi i set the FRP code as well...

Weird. I tune my pump and regulator for 15 PSI to the CP3. Never a problem, no codes whatsoever. I wonder why the discrepancy among the trucks? :confused:

BigD,

I am not sure what that noise is..could be the pilot injection..but I get that noise.

As far as why some do it and some not....could it be that these pumps..FASS/AIR Dog/Fuel Prep move a lot of fuel because they recirculate so much as part of the theory in removing vapor.

But I would still like to know what is happening...why does the pressure build and why does it not do it when the fuel warms up???

Could it be that we are stressing the Fuel pressure Regulator and some will be ok with it and some not??

I did notice that at idle the normal FPR flow is cut by more than half with the pump.

one thing to note is my truck has the emissions crap on it would this have anything to do with it, it is a lb7

bigd, how is the pump otherwise.....loud?...keep up?

Anyone running the 150hp version....feedback on that as well???

BigD,

Mine is also a CAT on an LB7...not sure if that matters.

I actually looked at the rail pressure desired versus actual and as the difference started to rise(that is more than the desired) the noise just got louder.

As the transmission downshifted then the pressure would start working its way down.

bigd, how is the pump otherwise.....loud?...keep up?

Anyone running the 150hp version....feedback on that as well???
the pump did not seem loud to me, however this comes down to preference i guess, i only left it on for a day then took it off,

I actually looked at the rail pressure desired versus actual and as the difference started to rise(that is more than the desired) the noise just got louder.

So, did you have a big program on.....how did the commanded and actual look then?

BigD/Big Dipper

It looks like it is the pilot injection. The difference in rail pressures shows up stock or with the small 65hp predator program I have in there now.

As an example...as you take the foot of the pedal the desired pressure might be 40mpa and the actual will start walking up....as high as 70mpa.

The noise is occuring as the pressure move up. Driving in today I had the predator screen on the fuel data and what I saw was.....as the pressure started to go up...as the truck was coasting....the timing on the pilot injection changed..and then the noise occured.

So lets say at idle...Main injection might be at -4deg the pilot was at +4deg. As you accelerate the timing advances....Main +4 deg the pilot was say +12deg.

Then as I coasted the Main went back towards a -2 to-3 degrees BUT so did the Pilot...It bounced around a bit but it was clearly almost lined up with the main injection timing.

Not sure what the heck is going on. Hopefully lowering the pressure fixes this. Like I said before I am running 11psi at the test port which I estimate at 13psi at the pump output. The new pump they sent me is supposedly 10psi at it output which hopefully is about 8psi at the test port.

modded EDU?



Weird. I tune my pump and regulator for 15 PSI to the CP3. Never a problem, no codes whatsoever. I wonder why the discrepancy among the trucks? :confused:

Nope.

so your EDU holds 15 PSI all by its 100% stock lonesome?:p:

so your EDU holds 15 PSI all by its 100% stock lonesome?:p:

Yes. I have been running it that way for a year, no leaks. I have not mic'd it out to see if the case has expanded a few thousands or not and I don't really care. It is an easy swap if it proves to have any issues.

I thought the original Bosch spec for our system was 15 PSI so I don't know what the BFD was on the EDU holding pressure. I think it would take quite a few PSI to blow one up and your FRPCV would nut up well before that limit.

Of course, Ah jus a dumb hayseed frum Gawjah so your results may vary. ;)

the only BFD here is someone's gonna blow one of these up someday and wonder why some people have problems and some don't, that's all...

re: the 15psi spec- i'll plead ignorance there, but from what i remember from reading the bosh spec book there is NO edu...

and while it may be an easy swap, how you ever looked at how much one of those goes for?

the only BFD here is someone's gonna blow one of these up someday and wonder why some people have problems and some don't, that's all...

re: the 15psi spec- i'll plead ignorance there, but from what i remember from reading the bosh spec book there is NO edu...

and while it may be an easy swap, how you ever looked at how much one of those goes for?

I was not :rant: at you, I just think it may have gotten hyped up a little more than necessary.

I have a spare already so the cost is a non-issue for me. The pllay/pay rule is in effect on this and at least I am seeing what will happen. I have not heard of anyone even leaking one yet but I don't follow it very close.

Anyway, sorry if you thought I was *****ing at you. :(

Been running the Fass for almost a year @ 7-9 psi. No problems to report.

It's pretty loud.
The recirculation of the unused fuel creates more vapor/foam in the tank as it splashes through the filler neck and on back into the mix.


Beware the "Hayseed" from Gawgia, he is a pretty "fart smeller",
uh I mean pretty "smart feller". :D

Been running the Fass for almost a year @ 7-9 psi. No problems to report.

It's pretty loud.
The recirculation of the unused fuel creates more vapor/foam in the tank as it splashes through the filler neck and on back into the mix.


Beware the "Hayseed" from Gawgia, he is a pretty "fart smeller",
uh I mean pretty "smart feller". :D

Just don't get downwind now, ya hear? :D I get the same thing with the foam on my return setup at about 1/4 of a tank. I try to keep it above 1/2 a tank at all times to minimize that because if it gets too low the foam causes some funky results. :eek:

You feeling better yet? Been getting lotsa compliments on the console gauge mount, BTW. :ro)

yes i have a foamy tank too.. at least there isn't soap in it..