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Fass Fuel System

Discussion in 'Trucks [ Eighteen Wheelers ]' started by pheebo, Mar 13, 2010.

Page 16 of 19
  1. Jan 30, 2015 #151
    little cat 500

    little cat 500 Road Train Member

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    Jan 17, 2010
    Abbottstown PA
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    if ya buy a fass get a extra motor for it they dont last couple month the warranty is good they replace them butyou have to ship it back
     
    little cat 500, Jan 30, 2015
    little cat 500, Jan 30, 2015
    #151
    bigguns Thanks this.
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  3. Jan 30, 2015 #152
    ironpony

    ironpony Road Train Member

    17,502
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    Sep 23, 2007
    Ask my GPS...
    0
    Haven't had any such problems with my FASS.
     
    ironpony, Jan 30, 2015
    ironpony, Jan 30, 2015
    #152
  4. Jan 30, 2015 #153
    Flightline

    Flightline Road Train Member

    2,345
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    Oct 1, 2011
    Almost There
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    I've heard the newer air dog fass system no longer uses any motor because it works on the high pressure side.
    I have one of the older systems, on my second motor in third year and they sent me a free replacement motor without sending the old motor back in. This was Airdog not FASS brand.
     
    Flightline, Jan 30, 2015
    Flightline, Jan 30, 2015
    #153
  5. Jan 30, 2015 #154
    ipogsd

    ipogsd Heavy Load Member

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    Jun 13, 2012
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    Nor I, guess we're just the lucky ones, :)
     
    ipogsd, Jan 30, 2015
    ipogsd, Jan 30, 2015
    #154
  7. May 19, 2015 #155
    TheLittleGuy

    TheLittleGuy Medium Load Member

    389
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    Apr 13, 2008
    Nashville, TN
    0
    Every product I've put on my truck has made some variation of that claim.
    By rights, I should have a 9+ mpg truck right now. But I don't.
    <shrugs> Can't go wrong with a Davco. So that's what I got. And it's doing great with a 2 micron filter.
     
    TheLittleGuy, May 19, 2015
    TheLittleGuy, May 19, 2015
    #155
  8. Nov 28, 2017 #156
    MACK E-6

    MACK E-6 Moderator Staff Member

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    Sep 19, 2005
    Baltimore, MD
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    Bump.

    I got into a conversation with one of our mechanics about these after asking out of curiosity about the micron rating on the fuel filters they're putting on our trucks, not to mention that I'm planning on putting a FASS on my pickup.

    Now, bearing in mind that I am certainly no diesel mechanic, at least certainly not when compared with the likes of our members @wore out and @OLDSKOOLERnWV, but my understanding of the common rail system such as that featured on the 6.7 Cummins is the lift pump supplies fuel to the injector pump with then takes what it needs to keep the rails and injector lines pressurized.

    Our mechanic that I talked to tonight however had the following theory.

    The FASS system I'm interested in has a flow rate of 95 gph, but according to him if you install an aftermarket lift pump and it happens to have a higher flow rate than the stock lift pump, this could lead to increased output pressure by the injector pump and overpressure at the injectors, and at a worse case scenario blowing the tip off an injector.

    Thoughts?
     
    MACK E-6, Nov 28, 2017
    MACK E-6, Nov 28, 2017
    #156
    OLDSKOOLERnWV Thanks this.
  9. Nov 28, 2017 #157
    swaan

    swaan Road Train Member

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    Jul 12, 2009
    BC canada
    0
    Your theory is correct.
    Your mechanic mmmmmm.......not so much.

    The fass systm or airdog system is exactly That, a lift pump. It job is to feed the high PRESSURE fuel pump or CP3 pump on a common rail system. They are adjustable and normally set to what the factory lift pump provides. This is psi . Volume is different and never hurt anything.

    It will have 0 effect on blowing the tips off your injectors.
     
    swaan, Nov 28, 2017
    swaan, Nov 28, 2017
    #157
    OLDSKOOLERnWV, MACK E-6 and T800H Thank this.
  10. Nov 28, 2017 #158
    MACK E-6

    MACK E-6 Moderator Staff Member

    48,140
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    Sep 19, 2005
    Baltimore, MD
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    I figured as much.

    I have to remember that this is a guy who claims to have invented anti-lock brakes and has no problem reminding everyone of that "fact". :rolleyes:
     
    MACK E-6, Nov 28, 2017
    MACK E-6, Nov 28, 2017
    #158
    OLDSKOOLERnWV Thanks this.
  11. Nov 28, 2017 #159
    OLDSKOOLERnWV

    OLDSKOOLERnWV Captain Redbeard

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    Nov 29, 2011
    West Virginia
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    Lol!!!' So all them years we used coins, visegrips and the such on the return lines, to put more pressure on the injectors was putting us at risk of blowing the Injector tips off? o_O Everything in life has to be used with common horse sense. I think he is out of it lol.
     
    OLDSKOOLERnWV, Nov 28, 2017
    OLDSKOOLERnWV, Nov 28, 2017
    #159
    MACK E-6 Thanks this.
  12. Nov 29, 2017 #160
    bigguns

    bigguns Road Train Member

    2,846
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    Jun 13, 2013
    Omega,GA
    0
    If the tips could be blown off, by now someone would have heard about the unhappy Dodge/Cummins pickup owners.
     
    bigguns, Nov 29, 2017
    bigguns, Nov 29, 2017
    #160
    MACK E-6 Thanks this.
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