Pete 359 fuel issue

Discussion in 'Peterbilt Forum' started by Asphaltcowgirl, Apr 5, 2016.

  1. Asphaltcowgirl

    Asphaltcowgirl Bobtail Member

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    Apr 5, 2016
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    Have an 84 model 359. Has the up/down fuel switch on the dash.. truck will run then want to shut off, fiddle with the switch it will fire back up and run for a while then cut out again. Any ideas here?
     
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  3. Bean Jr.

    Bean Jr. Road Train Member

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    If the switch is like the ones I had in my 379 and in my father's 281, that is for the fuel gauge. You probably have a different problem.
     
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  4. Asphaltcowgirl

    Asphaltcowgirl Bobtail Member

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    Ah ok, thanks! Is that switch at all connected to fuel flow or delivery?
     
  5. Bean Jr.

    Bean Jr. Road Train Member

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    On our trucks, it was only for the fuel gauge. A 359 may be different, but if the model before and after have switches for witch tank the fuel gauge is measuring, I would think it would be the same. Good luck finding the problem.
     
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  6. Straight Stacks

    Straight Stacks Paper Cha$er

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    rank and bullhaulerswife Thank this.
  7. Asphaltcowgirl

    Asphaltcowgirl Bobtail Member

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    Thanks y'all. I think you're right it's just for the gauges. Guess I need to check lines and such.
     
  8. AModelCat

    AModelCat Road Train Member

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    First off, what have you got in it for an engine?
    -When where fuel filters last replaced?
    -Have you started fueling up anywhere new since this issue started?
    -Is there any possibility of there being an obstruction due to debris inside the fuel tanks?
    -Are the fuel lines original or have they been replaced?
    -I mean no insult with this question but does the truck have fuel in the tanks? Fuel gauges can be innacurate.
     
  9. Old school 362

    Old school 362 Medium Load Member

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    I would
    that is switch is for reading left and right fuel tank.
     
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  10. Old school 362

    Old school 362 Medium Load Member

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    Disconnect fuel return line. On top of left tank. Then apply air pressure to fuel line return nipple. Until you have fuel coming out of line. Then replace line and start engine. Easy way to prime . If you don't get fuel you have a filter issue.
     
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  11. beemergary

    beemergary Light Load Member

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    I have a 84-359 and that switch is for right and left fuel level with one gauge. Should have a fuel pressure gauge. If you got atleast 30# means transfer pump is sending enough fuel thru filter to injector pump. Don't have a bad connection thru key to fuel on-off solenoid?
     
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