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1990 civic ex ls swap ?'s

Discussion in 'Civic and CRX - EF' started by twntrbocivic, Jun 11, 2009.

  1. twntrbocivic

    twntrbocivic New Member

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    i just bought a 1990 civic ex sadan i was wondering what is all involed to wire in a 1991 ls motor any help would be great
     
  2. CAFROG

    CAFROG Honda Minion VIP

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    Complete motor/trans/axles/ecu needs to be LS OBD0

    You need the aftermarket mounts for your EF with a b-series

    I think you need the si engine harness but could be wrong and any EF harness will work

    I'm not too sure on the wiring harness issue but you can search on this forum and find out
     
  3. pappaj

    pappaj New Member

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    does the car have mpfi.
     
  4. CAFROG

    CAFROG Honda Minion VIP

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    Its an EX....does that mean it is already have MPFI??
     
  5. D16SiHatch

    D16SiHatch New Member

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    yes
     
  6. twntrbocivic

    twntrbocivic New Member

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    yea it has 4 injectors allready i just dont know much about the ef i have a eg swaped allready i just wandering what wiring was involved with this swap thanks for help so far guys
     
  7. twntrbocivic

    twntrbocivic New Member

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    also i am new to the forum so where would i look to fing the wiring diagram that needs done any help would be great thanks
     
  8. pappaj

    pappaj New Member

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    There is alot of info on that swap. I did the same swap to my 89 crx si, just with the info on this site.

    With mine I used the stock si engine harness, I needed mounts, 90-91 integra axles, 90-91 integra ecu, injectors, injector resistor box, and shifter linkage. I didn't have to do any actual wiring besides extending the o2 wire. It is pretty much plug and play. The toughest part was figuring out the vacuum lines but there is a ton of knowledge around here.

    You need to ask specific questions as they arise.
     
  9. twntrbocivic

    twntrbocivic New Member

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    thanks man i was thinking that but wasnt sure
     
  10. nick3538

    nick3538 New Member

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    The si harness, Is that the one thats MPFI? Or is there a diffrent one? Mine was converted from dpfi to mpfi and im having the same question about the wiring swap.
     
  11. blasterman87

    blasterman87 New Member

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    the ex sedan has the same engine/harness as a 88-91 si, its a d16a6 and everything will plug in. mounts are b series mounts, axles are 90-93 teg for driver side and 90-01 teg for pass side(i believe those years are the same for pass side, as i have a 95 pass axle in my ef)and shif linkage, either buy it or modify 90-93 teg. if the engine is obd1 then you will need a obd0 ecu and dizzy, if its already obd0 then everything will work
     
  12. nick3538

    nick3538 New Member

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    Freakin sweet. Thaks for the info man :)
     
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