Fuel filter gauge on 06 MXS, light turning on when at 1500rpm.

Discussion in 'Ask An Owner Operator' started by AL617, Jan 19, 2022.

  1. AL617

    AL617 Bobtail Member

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    Hi you doing guys, I have a 06 mxs c15 acert. My fuel filter gauge marks 4 on idle and when I rev it up to 1500rpm gauge goes to 7 which makes the red light come turn on. It has a fresh Pm, new fuel pressure sensor. The only thing is I’m running a fleet guard fuel/water filter .. even with light on truck runs mint , no loss of power, everything smooth…before Pm fuel filter light didn’t turn on. It’ll be marking 5 on highway speeds 65-75mph. Any one has an idea of what it can be????
     
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  3. 201

    201 Road Train Member

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    Piece of black tape over the red light,,,that will be $400 bucks,,:eek:
     
    Roger McG and shooter19802003 Thank this.
  4. Catmando

    Catmando Road Train Member

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    Are you positive you have the correct fuel/ water filter installed
    I'am also not a fond lover of fleetguard filters .. I have aways used Cat filters on Cat engines myself
     
    Last edited: Jan 20, 2022
    Roger McG Thanks this.
  5. SmallPackage

    SmallPackage Road Train Member

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    Micron rating may be a little different and engine may be finicky about it..
     
  6. goga

    goga Heavy Load Member

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    Never heard of such thing as "fuel filter gauge". The beauty of running older equipment, never know and don't care as long as it is running)
     
  7. AL617

    AL617 Bobtail Member

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    Right now it has a fs19932 , which it’s basically stuck won’t loosen up , I just got a cat 256-8753 fuel/water hopefully that’ll fix the issue
     
    Catmando Thanks this.
  8. AL617

    AL617 Bobtail Member

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    8C2AD1B1-5E85-4E4C-BD5E-64A502A4963A.png Thats at 1500rpm
     
    Speed_Drums and shooter19802003 Thank this.
  9. SmallPackage

    SmallPackage Road Train Member

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    It’s a restriction gauge. I made one for my truck using a 2 -1/16 Stewart-Warner vacuum gauge. Matches all the original gauges in the dash. Best I can tell in my experiment on my old mechanical Cummins is most new filters ( Baldwin and Fleetguard) will show 2 to 4 inches vacuum of restriction new at full throttle. Replace filter when they start to show 10 inches. Pretty much like an air filter restriction gauge.
    your engine make and model may have different results.
     
    shooter19802003 and goga Thank this.
  10. SmallPackage

    SmallPackage Road Train Member

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    The restriction gauge may not only read restriction of the filter but the supply line as well. Filter may be fine but there may be a slight restriction starting to form in the hose or fittings from tank to filter head.
     
  11. bad-luck

    bad-luck Road Train Member

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    I believe what he is referring to is a fuel restriction gage. I have an older truck and have one.
     
    shooter19802003 Thanks this.
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