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P05 ECU, does it really have a 4300 fuel cut off??

Discussion in 'ECU's, Electronics, and Tuning' started by phyregod, Sep 19, 2005.

  1. phyregod

    phyregod !!YTINASNI

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    Well, after getting my new tach installed, I discovered that my weinie engine has a 4200-4500 RPM fuel cut off.. Either that, or there is something seriously wrong somewhere, because this critter completely shuts down like its hitting the rev limiter at somewhere between 4200-4500rpms... every time


    Is it really supposed to do that?
     
  2. xenocron

    xenocron Member

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    No, def not.

    Any CELs?
     
  3. pissedoffsol

    pissedoffsol RETIRED

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    cx should pull to about 6500 ish

    there's a good chance the tach is wrong... is it set on 4-cyl? did you tap it into the blue wire on the dist?
     
  4. phyregod

    phyregod !!YTINASNI

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    Its a factory gauge bezel that I installed. straight plug and play.

    I checked the timing this morning, it was way off, but I got it tuned back in where it should be and its still doing it..

    Totally cuts out at 4300rpms. just like its hitting a rev limiter.
     
  5. pissedoffsol

    pissedoffsol RETIRED

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  6. phyregod

    phyregod !!YTINASNI

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    Going to go look.. I assume stock. Oh, BTW, no CEL...


    ***EDIT***

    Just looked, it is for certain a P05.
     
  7. pissedoffsol

    pissedoffsol RETIRED

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    go to a junkyard... find another one. or find one on here... cx ecu can't be worth more than 20 bucks... see if its the ecu...

    it should go to 6500...
     
  8. phyregod

    phyregod !!YTINASNI

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    There is a sticker on the outside of the case about some ecu company in grand prarie, tx... And paper stickers with "warning, do not open" and "will void warantee"..

    That can only be a bad thing.. some hick in grand prarie tx was inside my ECU.
     
  9. pissedoffsol

    pissedoffsol RETIRED

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  10. reckedracing

    reckedracing TTIWWOP VIP

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    sounds more like it was sent out to be repaired...
    some companies claim materials used in the ecu, so capacitors tend to have their seal shrink and leak onto the board...

    i would bet there's jumper wires and solder in there to repair the board...

    chipping a stock cx? i dunno about that...
     
  11. phyregod

    phyregod !!YTINASNI

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    Its so weird.. This car won't WONT do more than 85.. getting it to 70 is a PITA.. Seriously, floored it hangs around 70ish..

    When you floor it in 2nd gear, it works its way up to 43-4400rpm then cuts out, and if you leave it floored, it stays cut out untill 3500 RPM then the power returns and it goes back to 4300rpms.. back and forth.. It does it in neutral too, same thing.

    Does the CX have a neutral rev limiter that might be malfuctioning? My wife's sunfire wouldn't let you rev past something like 4 grand when in neutral, but in gear it would go up to redline.

    Wait a tic.. Could it be an auto ecu??
     
  12. reckedracing

    reckedracing TTIWWOP VIP

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    http://www.avproecm.com/mazda.htm

    apparently mitsubishi made the electronics for many car manufacturers, ecu, and they also did honda auto tranny computers...
     
    Last edited by a moderator: Oct 31, 2013
  13. reckedracing

    reckedracing TTIWWOP VIP

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    is the third number from the last a 5? or an a?

    there was a write up on auto vs standard ecu's in the refrence section

    sounds like an ecu issue, not a neutral safety rev limiter feature
     
  14. phyregod

    phyregod !!YTINASNI

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    Yup, those are the people who worked on my ecu..

    They offer a 15 month warantee according to their sight, and this one was purchased november 2000 according to their sticker.

    I wonder if this car has really had an auto ecu for the past 5 years...

    What, in the ecu code, would I be looking for?

    37820-P05-A01
    730 605847

    are the numbers on the ecu itself.
     
  15. pissedoffsol

    pissedoffsol RETIRED

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    just get another ecu. its not worth the time to tear it apart. i bet there's 3423423 cx ecu's available for $20 if you make a post looking for one...
     
  16. reckedracing

    reckedracing TTIWWOP VIP

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    http://www.hondaswap.com/forums/index.php?showtopic=7991

    looks like a stock 5 speed ecu, but its shitted...
    i would look in it, but def get a diffrent one...
     
  17. phyregod

    phyregod !!YTINASNI

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    hitting ebay right now.. 37 shipped is the best deal I can find, so far.
     
  18. pissedoffsol

    pissedoffsol RETIRED

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    make a post man. i'm sure tons of people have cx's that they swapped...
     
  19. jimboburgess

    jimboburgess Go fast, Go Cheap

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    Even with a proper ecu the top speed is around 85 unless you find a hill.
     
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