P030X Random Misfire & Limp Mode Questionaire and Discussion Thread

Discussion in 'Drivetrain, Exhaust and Electrical' started by zzyzx, Jul 25, 2012.

What solution was administered to address your P0300/Limp Mode Issues

  1. Crankshaft Sensor Relearn was performed

    25.9%
  2. PCM Software Upgrade performed

    14.8%
  3. Crankshaft Sensor replaced

    7.4%
  4. Cam Sensor(s) replaced

    0 vote(s)
    0.0%
  5. Wiring Harness replaced

    0 vote(s)
    0.0%
  6. Multiple actions taken (add as a reply to this thread)

    18.5%
  7. My issue is still pending (add actions taken below as a reply)

    33.3%
  1. TMSBOSS

    TMSBOSS TMO Addict

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    Cant blame you for being unhappy with the code. Fortunately, this was a common issue a year or so back which has been addressed by the factory. The computer update and o-ring has been the cure.

    Good luck.
     
  2. ArizonaBOSS

    ArizonaBOSS Because racecar. Moderator

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    I'm going to have to agree; certainly nothing to be happy about, but fortunately for you the rest of us have already been through this and have clear paths to solution identified for you. :)

    Be glad you didn't have to own the car through the times when we were all still scratching our heads (Ford and dealers included) over what to do.
     
  3. Flyboygsxr

    Flyboygsxr ADAM

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    What is the TSB # for this? It started happening to me two weeks ago and has happened about 10 times since. Wasn't ever a problem before until I started running the car with traction control and stability control completely off…not sure if it is just a coincidence or if the two are connected. Anyway, if anyone has the TSB # I want to take it into the dealer. Thanks

    Adam
     
  4. GTW

    GTW TMO Beginner

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    2 months since I had my random misfire issues addressed by the TSB 13-06-15 and all is good. The only issue now is having to put the car away for the winter along with my '07 GT/CS. I get the blues this time of year.
     
  5. Flyboygsxr

    Flyboygsxr ADAM

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    What goes into replacing the CPS o-ring? I'm just curious as to how much a dealership will be doing to my Boss. I hate taking it to the dealership. Last time they over serviced the rear diff when I took it in cause the axle seals were leaking. They filled the diff to the top of the fill hole. I have the 13 Boss diff cover so it must have been at least an extra quart. Oil was coming out of the diff breather everywhere which is what keyed me in to have this checked out. I was pissed and I burned my hand when I pulled the fill plug because I didn't expect it to come spraying out.
     
  6. ArizonaBOSS

    ArizonaBOSS Because racecar. Moderator

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    To do this it's one bolt at the back side of the engine that's easily accessible once the battery and tray are removed. Very non-invasive.
     
  7. 576

    576 Guest

    I have had the misfire codes appear 4 times at the last session of 4 outings. Red key. Advantrac off completely. No aftermarket tune. Warmest part of the day 3-4 laps into last session of 4. Cleared the misfire codes either with my scan tool or battery disconnect. It has always run o.k. My question is… has anyone installed the o-ring per the TSB without doing the relearn procedure. It seems the o-ring may be added to combat vibration? I have not looked, but do not think the sensor mounting has any adjustment. I wonder as well, does anyone know exactly what the relearn is? Is it a software upgrade piece or a reset of adaptive values to set a baseline for the adaptation to work from? Thanks.
     
  8. ArizonaBOSS

    ArizonaBOSS Because racecar. Moderator

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    Relearn is a "teaching" procedure where the computer sets the baseline level for knock present during engine operation. They plug in IDS, select the relearn procedure, rev to 4000 RPM for a few seconds, and that's it.
     
  9. 576

    576 Guest

    Thanks. I think I will try the next track day and see what happens. I did 2 track days prior to the 4 misfire events. What changed? Front/ Rear foam under the intake was removed. I have a hard time believing this could have any effect on the knock sensors, but I put them back in mainly to keep debris out of the valley area. I'll see what happens.
     
  10. twistedneck

    twistedneck TMO Race

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    in my 2012 GT I started getting P0300 and P0302 codes as soon as I swapped to the boss intake. Since then I've changed:

    cams / heads - no fix
    cj intake - no fix
    clutch and about 3-4 relearns - no fix
    o ring added an new crank sensor - no fix
    cylinder 2 new coil, plug, etc.. no change still P0302. plugs look identical to each other and very nice / oil free no black spots or white spots.
    Changed to E85 - no fix.
    Multiple tunes from AED, no fix.
    never has activated limp mode for some reason.

    Mine will come on within 24hrs of re-setting it. usually while idling in the drive through or slow traffic. I am so sick of it I just let the light stay on and check it every couple weeks.. its got to be a computer glitch.
     
  11. 13Boss#3328

    13Boss#3328 TMO Race

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    2 years ago they did the O ring TSB for me, it was fine until yesterday, it went into limp mode and threw p0315 code.
    Do you think a relearn is needed?
     
  12. twistedneck

    twistedneck TMO Race

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    Its worth a try but I've done four relearns and none worked to eliminate the engine light.
     
  13. 13Boss#3328

    13Boss#3328 TMO Race

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    I just got done with the dealer, they did the O ring TSB again and all the relearning required. When I asked them the reason why the O ring TSB was done again they did not necessarily have an answer.

    Will see how it behaves for the next track day...
     
  14. twistedneck

    twistedneck TMO Race

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    How did the track day go? Did you try the 22mm rear bar?
     
  15. 13Boss#3328

    13Boss#3328 TMO Race

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    coming soon...
     
  16. big red one

    big red one TMO Race

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    Well i have had the P0300 code now after 5 laps on track, went home thinking it was something bad then cleared it and drove on the street fine.

    A week later came on again whilst changing through the box at high revs, again cleared it

    last weekend drove 250 miles at normal driving speeds lots of short and medium journeys and no light, so this is only happening at high RPM

    Mines a 2013
     
  17. twistedneck

    twistedneck TMO Race

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    I would not worry about it - if you have the extra rubber o-ring fix its just the CKP sensor having issues with vibration. Mine has all of those fixes and still comes on constantly, never in limp mode. BUT... something different happened tonight.

    After some spirited driving I got in my car to drive home and the ALWAYS ON for years now engine light (p0300) was off! does the car auto clear codes after x amount of time? I stopped clearing the codes last year because it was annoying. suddenly now the codes are gone?
     
  18. drano38

    drano38 Wayne

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    Finally made an appointment to get this done Friday. They had to order the O-ring.
    I asked the service rep what the "Misfire Monitor Neutral Profile Relearn" entailed.
    He said just let it run for a few minutes.
    But some internet searching found a post that said it requires the IDS--Start session, toolbox tab, engine, scroll down to it.
    So I guess I'll have to gently teach them one of the obscure requirements of the relearn.
     
  19. cloud9

    cloud9 Gary

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    Interesting. Mine had settled down after the O-ring and PRS but now it's back. I was getting the code quite a bit on track a couple weeks ago but now got it and a CEL on the street tonight. Everthing "runs" fine but why would it all of a sudden start happening again?
     
  20. ArizonaBOSS

    ArizonaBOSS Because racecar. Moderator

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    Yes, you need IDS. You connect IDS, select the MMNPL, let the car warm up to 177*F + coolant temps, then one quick rev above 4K RPM and you're done.
     

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