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Clarity needed

Discussion in 'General Tech and Maintenance' started by badbreedchiney, Sep 18, 2009.

  1. badbreedchiney

    badbreedchiney New Member

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    I have a 1990 honda civic dx with a sohc zc motor. i was told by my electrician that my ecu needs to be changed. was checking out which ecu would be best for my car when a few questions started appearing and i could not find a definate yes or no answer or one that would answer my questions properly so here goes.

    When i search for the honda zc engine i keep coming across d15 and d16 motors. i get that the zc is a d series motor but does that mean it is a d16/z6 motor in particular or just a zc motor alone?

    can any d series part fit onto my zc motor?

    heard that the pm7 ecu would work best for my motor but it comes from a dohc and my motor is sohc. will this work ok? if so would there be any added benefits to using a dohc ecu on a sohc?


    just trying to get my head straight and ensure my car runs at its best.
     
  2. badbreedchiney

    badbreedchiney New Member

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    oh i forgot to mention...sohc non vtec...sorry i left that out
     
  3. reikoshea

    reikoshea HS Troll...And Mod Moderator VIP

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    Most people use a PM6 ecu to keep it close to stock. the pm7 has maps that are close, but you tend to run a bit rich. The other option is chip the pm6 and have it tuned professionally.
     
  4. badbreedchiney

    badbreedchiney New Member

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    is the pm6 ecu for a non vtec head?

    is it better to run a ecu for the exact engine in the car or do other ecu's give better performance?
     
  5. reikoshea

    reikoshea HS Troll...And Mod Moderator VIP

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    So, you're going into the twilight zone of the late 80's hondas. ZCs are a giant ? in this world. pretty much all the motors in the obd0 era (88-91) civics/crxs are stamped zc in japan/europe. There are even dohc and sohc varieties. If you have the sohc, you need to be using the pm6 ecu as its as close as you're going to be able to find.
     
  6. badbreedchiney

    badbreedchiney New Member

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    ok cool thanks man. as for my other question. can any d-series engine parts fit the zc?

    also is the zc motor from the d16 series or d15?
     
  7. reikoshea

    reikoshea HS Troll...And Mod Moderator VIP

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    its LIKELY a 1.6, but the zc can be 1.5L or 1.6L.

    if your engine looks like this:

    [​IMG]

    you should just work with the engine like it is a d16a6 (Honda Civic EX 1990-1991)

    If thats not what your engine looks like, take a picture (camera phone is fine) and I, or someone else will help you ID it.
     
  8. badbreedchiney

    badbreedchiney New Member

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    the engine is more like this...

    [​IMG]
     
  9. badbreedchiney

    badbreedchiney New Member

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  10. reikoshea

    reikoshea HS Troll...And Mod Moderator VIP

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    does it say vtec anywhere on the valve cover?

    if not, then keep all the info i listed above? if its not vtec then you should just act as if it's an a6.
     
  11. GlassHeadlights

    GlassHeadlights West West Yall

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    Are the spark plug wires at the front or back of the head?

    Not all VTEC motors have VTEC casted on the valve cover, look for the VTEC solonoid.
     
  12. reikoshea

    reikoshea HS Troll...And Mod Moderator VIP

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    I was unaware there was any vtec motor without vtec on the valve cover (outside of the y8 he pictured above). But if you know where to look for the solenoid, you can see if it's there, but since the vtec solenoid is not something that is standard on most cars its hard to know where to look.
     
  13. GlassHeadlights

    GlassHeadlights West West Yall

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    Some select D16Z6s didn't say vtec, like mine. :(
     
  14. badbreedchiney

    badbreedchiney New Member

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    its not a vtec head(stated that above btw) the spark plug wires are at the front. i'll take it that its the d16a6.

    so i'll go with the pm6 ecu and that will be another problem down :)...thx guys
     
  15. badbreedchiney

    badbreedchiney New Member

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    Btw no-one answered my question as to if any d-series part can fit onto the Zc motor...
     
  16. reikoshea

    reikoshea HS Troll...And Mod Moderator VIP

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    and i told you to work on the engine as if it were a d16a6.
     
  17. badbreedchiney

    badbreedchiney New Member

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    another question. when i bought the car the previous owner told me got the zc motor from a 1996integra. but i was doing some reading and i can't find a sohc zc motor for a 1996integra.

    can i get some clarity on this and whether or not the pm6 ecu is still the right one and if i should still treat it as a d16a6 as stated above...
     
  18. reikoshea

    reikoshea HS Troll...And Mod Moderator VIP

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    he lied. 96 integra only came in dohc.
     
  19. badbreedchiney

    badbreedchiney New Member

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  20. INJEN78

    INJEN78 HS LEGEND

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    yes you can use the pm ecu on your zc..and zc come in early model integras..
     
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