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O2 problem

Discussion in 'Civic and del Sol - EG and EK' started by scott25, Mar 26, 2007.

  1. scott25

    scott25 New Member

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    I know this isn't a common swap but i just wanted to get my 93 civic dx running so i bought a VX engine. The swap was easy but however the ecu code 41 comes on and I'm sure that its because the vx motor has a 7 wire O2 and i used my original 4 wire harness. Iv searched a coupe of forms now and i cant find anything on this swap(probably because no one wants less horsepower) This was my first swap and if i can get this working ill be looking into getting a B16a2 swap. The car was in bad condition when i got it and i wanted to get it running first. If someone can help my i would be very grateful.
     
  2. custompainter

    custompainter drive it like U stole it

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    wich ecu are you using
    with harness are you using
    wich throttle body are you using and are you using your orginal exhaust manifold and exhaust system
     
  3. scott25

    scott25 New Member

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    I am using the ecu that was with the vx motor (d15z1) im not sure what the ecu is. I did wire up the v tech E and it seems to be working. I am however using the original harness, exhaust manifold, and intake. The car starts but it's serging and im getting the O2 code from the ecu. I have the original 02 sensor and i cheap vx one off ebay. I got the haynes book but it doesn't show the wiring for the Vx motor. any suggestions?
     
  4. custompainter

    custompainter drive it like U stole it

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    It's your intake manifold that is causing your problem. The IAC sensor is different. You need to use the one that came with the VX, if you are using the VX ECU.
     
  5. scott25

    scott25 New Member

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    would i need to wire the egr since there isn't a harness for that and also do you think that i can use the original O2 sensor.
     
  6. custompainter

    custompainter drive it like U stole it

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    you need to use the same o2 sensors that the ECU is set up for
    if you have the vx o2 sensors use them
     
  7. custompainter

    custompainter drive it like U stole it

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    This article exploits a combination of ECU pin locations and wire colors for all M/T '92-95 Civic / '92-95 Integra / '92-95 Prelude VTEC and NON-VTEC vehicles.
    OBD1 PLUG CONFIGURATION

    Below is an example that shows the common onboard male connectors for a Honda OBD1 ECU.
    Take note of plugs: A, B, and D.

    The 4-plug OBD1 connector image below is proof these do exist and are usually found on JDM AUTO 92-95 Civic, Integra, and Preludes.
    Sorry - I do not have pin schematics for the JDM 4-plug OBD1 ecu! Although, connectors A B D should technically be the same pin locations as a 5spd 3-plug OBD1 ECU.

    [​IMG]

    [​IMG]




    ADDITIONAL INFORMATION

    These pin-out locations were cross-referenced with OBD1 Civic/Integra/Prelude Helm's service manuals.

    The information in this article applies to:

    • All US & JDM OBD1 (92-95) M/T civic ecu's
    • All US & JDM OBD1 (92-95) M/T integra ecu's
    • All US & JDM OBD1 (92-95) M/T prelude ecu's
     
  8. custompainter

    custompainter drive it like U stole it

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    This article exploits a combination of ECU pin locations and wire colors for all M/T '96-98 Civic and '96-99 Integra VTEC and NON-VTEC vehicles.
    OBD2A PLUG CONFIGURATION

    Below is an example that shows the onboard (female) connector configuration for an OBD2a ECU.
    Take note of plugs: A, C, and D.
    The blank connector (B) is only used with civic/integra vehicles equipped with A/T.

    [​IMG]

    [​IMG]




    ADDITIONAL INFORMATION

    These pin-out locations were cross-referenced with OBD2a Civic & Integra Helm's service manuals.

    The information in this article applies to:

    • All US OBD2a (96-98) M/T civic ecu's
    • All US OBD2a (96-99) M/T integra ecu's
    • All JDM OBD2a M/T civic ecu's
    • All JDM OBD2a M/T Integra ecu's

    Contact Katman
     
  9. custompainter

    custompainter drive it like U stole it

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    i dont know what year your vx motor is but these spec's should help you get somewhere with it
     
  10. scott25

    scott25 New Member

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    thanks, thats what i was looking for

    I did try useng the original ecu and i still had the same surging problem and code41
     
    Last edited: Mar 29, 2007
  11. custompainter

    custompainter drive it like U stole it

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    how you makin out with your car ??
     
  12. scott25

    scott25 New Member

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    i still haven't got it. If i cant get it i think im just gonna buy a b16 from jdm source. There are lots of guides on that swap and alot faster. i was just hoping i could drive it till i get the money which wont be for a few months
     
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