Close

Page 1 of 2 12 LastLast
Results 1 to 15 of 20
  1. #1
    Registered User epiphany47's Avatar
    Join Date
    Jun 2010
    Location
    Slidell
    Posts
    8

    EP3 w/ K20A swap O2 Sensor Trouble

    Whats going on guys,

    I have an 02 EP3 with a K20A swap, and I cannot get my A/F sensor to work to save my life. I have checked fuses and continuity. I have also replaced it with the oem part. Mods include cold air, clutch, and flywheel. Car idles horribly and smells horrible. Does anyone have the wiring diagram for the sensor receiver that is on the car?

  2. #2
    Bonnie...real OG RedSiBaron's Avatar
    Join Date
    Dec 2006
    Location
    Cincinnati
    Posts
    4,430
    Quote Originally Posted by epiphany47 View Post
    Whats going on guys,

    I have an 02 EP3 with a K20A swap, and I cannot get my A/F sensor to work to save my life. I have checked fuses and continuity. I have also replaced it with the oem part. Mods include cold air, clutch, and flywheel. Car idles horribly and smells horrible. Does anyone have the wiring diagram for the sensor receiver that is on the car?
    you have k20a ecu or kpro?
    my ep is white...

    - We can talk numbers all you want, but the bullshit stops when the flag drops...

  3. #3
    Registered User epiphany47's Avatar
    Join Date
    Jun 2010
    Location
    Slidell
    Posts
    8
    k20a

  4. #4
    Bonnie...real OG RedSiBaron's Avatar
    Join Date
    Dec 2006
    Location
    Cincinnati
    Posts
    4,430
    Quote Originally Posted by epiphany47 View Post
    k20a
    that could be your problem why its running poorly...k20a requires something like 94 japanese octane which is like us 104 octane or some shit, american 93 is not going to come close to the flame propagation properties of the japanese fuel

    when the 02 sensor fails, the motor typically just runs in a default rich mixture in my experience and runs fine

    also what header are you running? are you running the stock k20a ITR/CTR header with the cat and a working secondary or are you running an aftermarket header with an 02 sim?
    my ep is white...

    - We can talk numbers all you want, but the bullshit stops when the flag drops...

  5. #5
    Registered User epiphany47's Avatar
    Join Date
    Jun 2010
    Location
    Slidell
    Posts
    8
    Ive read that people use kpro to get rid of the light all together. Im using the ecu that came with the K20A3 that was in my car previously. The only code im throwing is the O2 sensor, and when I was changing it the connector came off the car. I think I may have wired it wrong. Do you know what the wires are for? The colors are blue, white, green, and red/black. Im using the stock header with a cat and the secondary sensor works fine.

  6. #6
    Bonnie...real OG RedSiBaron's Avatar
    Join Date
    Dec 2006
    Location
    Cincinnati
    Posts
    4,430
    Quote Originally Posted by epiphany47 View Post
    ive read that people use kpro to get rid of the light all together. Im using the ecu that came with the k20a3 that was in my car previously. The only code im throwing is the o2 sensor, and when i was changing it the connector came off the car. I think i may have wired it wrong. Do you know what the wires are for? The colors are blue, white, green, and red/black. Im using the stock header with a cat and the secondary sensor works fine.
    oh fawk dude, you cant run a k20a on a stock k20a3 ecu and have it run properly and the stock header and cat off the a3 is going to restrict the shit out of it (if thats what you are saying you are using, since you didnt say if it was a stock k20a3 or k20a header/cat)

    these two engines are wildly different, you need kpro

    and they use kpro to get rid of the light from secondary o2 when using an aftermarket header without a cat
    my ep is white...

    - We can talk numbers all you want, but the bullshit stops when the flag drops...

  7. #7
    Registered User epiphany47's Avatar
    Join Date
    Jun 2010
    Location
    Slidell
    Posts
    8
    Ok. Will everything run correctly if I keep the Stock header and cat but get kpro??

  8. #8
    Bonnie...real OG RedSiBaron's Avatar
    Join Date
    Dec 2006
    Location
    Cincinnati
    Posts
    4,430
    Quote Originally Posted by epiphany47 View Post
    Ok. Will everything run correctly if I keep the Stock header and cat but get kpro??
    it may run correctly, but the stock k20a3 header and cat were designed for a much lower compression ratio and hp output...i highly suggest getting atleast an ITR/CTR header/cat combo for your k20a, its whats supposed to be there so the engine breathes properly...

    also follow up on your o2 sensor, i cant help you on the wiring, but there should be a thread on here somewhere about what wires go where, search for o2 replacement or something...iirc the thread was something about wiring up the plug onto a bosch o2 or something
    my ep is white...

    - We can talk numbers all you want, but the bullshit stops when the flag drops...

  9. #9
    BoostedK24a2 japarossa's Avatar
    Join Date
    Oct 2009
    Location
    Down the 1320
    Posts
    447
    It will run ok with the stock header and cat but not as good as it would with type r or aftermarket header and cat. The most important thing you need is kpro, no sense having that motor without kpro because it will run like ass. You may even damage the motor running it with a stock ep3 ecu.

  10. #10
    I.C.U.P. FoReVaPmP's Avatar
    Join Date
    Jun 2004
    Posts
    5,229



    K-pro is Needed.... end of story.
    Last edited by davisj3537; 12-08-2008 at 07:07 AM.

  11. #11
    Registered User civictype_r04's Avatar
    Join Date
    Jul 2005
    Location
    THE *215*
    Posts
    3,868
    Quote Originally Posted by Forevapmp View Post



    K-pro is Needed.... end of story.

  12. #12
    Registered User epiphany47's Avatar
    Join Date
    Jun 2010
    Location
    Slidell
    Posts
    8
    Ok thanks. Ill be ordering Kpro soon and Ill let you guys know how it works out. Thanks for responding so fast.

  13. #13
    Registered User civictype_r04's Avatar
    Join Date
    Jul 2005
    Location
    THE *215*
    Posts
    3,868
    Quote Originally Posted by epiphany47 View Post
    Ok thanks. Ill be ordering Kpro soon and Ill let you guys know how it works out. Thanks for responding so fast.
    Yeah dude don't start the car again till you get Kpro!!!!!!!!!!

  14. #14
    Registered User Tokin_Buds's Avatar
    Join Date
    Nov 2010
    Location
    severnaya zemlya
    Posts
    90
    I think its strange someone plunked down a bunch of cash for a k20a and didnt know about kpro or the difference between the k20a3 and k20a.. just my thoughts..

  15. #15
    Registered User epiphany47's Avatar
    Join Date
    Jun 2010
    Location
    Slidell
    Posts
    8
    I know its strange. A complete beginner error. To be honest I was under the impression that the ecu worked with it. I was misinformed.

Page 1 of 2 12 LastLast

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Tags for this Thread

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •