Spn 3055 fmi 0

Discussion in 'International Forum' started by Twista89, May 25, 2021.

  1. Twista89

    Twista89 Light Load Member

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    Oct 2, 2017
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    So recently this code has come on after hearing my truck out the shop for a new clutch. I see air bubbles in the fuel water separator as well. Is there an easy fix for this?

    Spn 157 fmi 0 is also inactive now
     
    Last edited: May 25, 2021
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  3. ChuckMartel

    ChuckMartel Light Load Member

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    Jan 22, 2021
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    Both those codes are for fuel rail pressure being too high. Could have a restricted return line or a bad pump. Wouldn’t hurt to fix the air in the system and see what happens.
     
  4. Twista89

    Twista89 Light Load Member

    84
    38
    Oct 2, 2017
    0
    So I put some fuel cleaner in which restored some power and temps started to return to normal. I figured it was bad fuel but now this morning I wake up to the fuel water separator being empty and I had yo prime the engine. It runs fine with full power but I have to keep priming thr motor if I turn it off. No hard starts or misfires. The separator is also empty while running as well.
     
  5. ChuckMartel

    ChuckMartel Light Load Member

    104
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    Jan 22, 2021
    0
    Still probably getting air in there which causes the fuel to drain back. Check all your voss fittings on the suction side, including tank fitting o-rings. Worst case you have a cracked stand pipe on the tank.
     
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