Cat 3406 B fuel issue, idles fine, but cuts out with higher RPM's

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Kenfro66, Jan 21, 2021.

  1. Kenfro66

    Kenfro66 Bobtail Member

    1
    0
    Jan 21, 2021
    0
    Driving at 65 mph truck started puttering then it stalled. I tried re starting and it wouldn't so I pulled fuel filter off put fresh conditioner in it and it started right up and I completed my night. The next night it ran ok for a few hours then started puttering again but it didn't stall. I even shut it off to pull filter and dump it out and refill again. Truck started but still puttered all the way back. I was thinking water in the fuel. Put a few bottles of fuel power in it and changed filter again. Started Monday night and made it 20 minutes out of terminal. Truck shut off and would not re start even after changing filter AGAIN. Shop nearby DRAINED both tanks and found water in fuel, new filter and conditioner. Picked it up today took it to top off fuel tanks, put more conditioner in and low and behold, still doing it....bobtailing. When I made it back to terminal, thank god with out a tow, I revved engine and pushed RPM's and then it cut out, then came back a few times so it does it standing still. I am at a loss....AIR in fuel ? Fuel transfer pump ? it sounds great a normal idle.
    ANYONE have any thoughts ?
     
  2. Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  3. 062

    062 Road Train Member

    4,281
    8,379
    Oct 20, 2013
    0
  4. Oxbow

    Oxbow Road Train Member

    6,492
    76,407
    Nov 24, 2015
    Idaho
    0
    Possible problems would include:

    Something (like flap off of an additive jug) blocking the outlet in the tank or pick up tube.
    Cracked pick up tube sucking air.
    Collapsed interior of fuel hose.
    Transfer pump.
    Check valve in priming pump flipped over.
    Plugged water separator filter or screen.

    If you've already drained the tanks once then hopefully any debris in the tank would have been found.

    Good luck and please post what you find.
     
  5. wore out

    wore out Numbered Classic

    12,316
    158,937
    Jun 5, 2013
    CHASIN THE DEVIL'S HERD
    0
  • Truckers Report Jobs

    Trucking Jobs in 30 seconds

    Every month 400 people find a job with the help of TruckersReport.

  • Draft saved Draft deleted