2012 maxxforce 13 boost surging

Discussion in 'International Forum' started by RickieBrent, Oct 12, 2017.

  1. Heavyd

    Heavyd Road Train Member

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    One of the most important numbers here is the "SA" number. "SA" is for "Source address", or the actual module or component reporting the fault. All the computers in the truck are linked through the datalink, and this is why it is important to know which one is reporting.
    From the top;
    SA 150 is your SART module, or Stand Alone Real time clock. This is the module that keeps time for the engine. It is battery powered. The battery is likely dead and it isn't communicating anymore. This can cause regen problems because it can cause fault codes that don't exist due to time problems. If you have ambient air temp faults along with this code, this should be fixed first.
    SA 0 is the engine. That code is for intake manifold pressure, (boost sensor) data incorrect. This is likely causing your boost surging issue so you need to check for circuit or sensor problems
    SA 58 is your rear HVAC module, that code is for the temp actuator not responding as commanded.
     
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  3. RickieBrent

    RickieBrent Bobtail Member

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    Yes, thank you. I had just managed to find the spn 102 boost sensor, but couldn't find the fmi 2 anywhere. I assume the boost sensor is also the map/baro and would be on the intake?
     
  4. Heavyd

    Heavyd Road Train Member

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    No. Boost sensor is in the intake horn on the left side. 3 wire sensor.
     
    Rngls and 2013Maxx Thank this.
  5. RickieBrent

    RickieBrent Bobtail Member

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    I changed it, no difference, it was pretty sooty so worth changing anyways. I guess I'm going to change the acv, I did read there was connection problems from acv to ecm, mine has been ziptied tight all around and looks fine. Only step I know to go since I can't test the acv. I removed cac pipe just too check and it was completely clean and dry.
     
  6. RickieBrent

    RickieBrent Bobtail Member

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    just so odd that it does it so bad from off idle-1400 rpm (the surging/ wastegate relief) then like dead on 1400 every time and up it's perfect.
     
    Kameron Thanks this.
  7. Heavyd

    Heavyd Road Train Member

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    To rule out the turbo or acv, you can pinch off the air line to the wastegate on the turbo when the key is off. This will give you full time boost, so word of caution, it can't dump overboost, so watch your boost gauge while under load so you don't over boost it. 43 psi is max spec. Try this and see if the boost and surge problem continue or not.
     
    RickieBrent Thanks this.
  8. RickieBrent

    RickieBrent Bobtail Member

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    Thanks big time for that. The acv doesn't look cheap. And that is strange bc the last day when it got really bad my boost gauge was reading in mid/ high 50s.
     
  9. Heavyd

    Heavyd Road Train Member

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    It will be hard to trust the gauge since you have that code for the boost sensor.
     
  10. jamespmack

    jamespmack Road Train Member

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    All this talk. Have you checked turbo boots or psi test air to air looking for a leak? Keep it simple.
     
  11. RickieBrent

    RickieBrent Bobtail Member

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    I replaced the sensor just for the sake, and it seems to be right on with load and sound, it only jumps with surge so it seems to be fairly accurate, but yeah I understand. I have looked around for any signs of leaks and anything loose. But the only thing I really inspected was the from turbo to cooler to see any obvious turbo failure.
     
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