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jdm b18c into 99 civic ex HELP????

Discussion in 'ECU's, Electronics, and Tuning' started by udcivic, Apr 19, 2008.

  1. udcivic

    udcivic SiR-G

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    Ok i had just bought a Jdm B18C engine, i have the mounts and everything i need to do the swap. My question is do i use my stock engine harness off my 99 ex? Can someone give me some info on what i have to do???? I have the b18c engine harness as well...

    please help ...thanks
     
  2. 99sidude

    99sidude Moderator Moderator VIP

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    The jdm harness won't work because the shock tower connectors are reversed b/c it came from a rhd car. Just use the ex harness and run the additional wires for the knock sensor, iab's etc....

    What year is the b18c from? If it is an obd2-a (96-98) or obd1 then you might have to get a jumper harness so you can plug the ecu in.
     
  3. udcivic

    udcivic SiR-G

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    im not sure what year it is....but is it hard to add the wire for the knock sensor and iab's, also i noticed that the fuel injector plugs are different so is it just a matter of swapping plugs?
     
  4. 99sidude

    99sidude Moderator Moderator VIP

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    Running the wires is easy. Run the wire from the appropraite pin on the harness connector to the right pin on the ecu. There are diagrams in the reference section. I have always been under the imprssion that obd1 and obd2 motors have the same injectors. They may look different, but see if it connects up.
     
  5. udcivic

    udcivic SiR-G

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    ok so if i have a 99 civic ex and im swapping to the p72 ecu out of the integra what pin out chart do i go by in the reference section? Sorry to be a pain, but just wanna make sure everything goes right.
     
  6. 99sidude

    99sidude Moderator Moderator VIP

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    http://hondaswap.com/reference-materials/ecu-pinouts-28667/

    What year is the motor/ecu from? If its 92-95 then go from the obd1 list, if its a 96-98 then its obd2-a, and if its 99-00 then its obd2-b. Your car being a 99' is odb2-b, so if the p72 ecu isn't obd2-b, you need to get a jumper harness from rywire.com , or do it yourself, which would be a pain in the ass.
     
  7. udcivic

    udcivic SiR-G

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    ok , one more thing that came to mind. I'll have to get a 00 si rear tranny bracket i take it or will the one on the ex be reused?
     
  8. 99sidude

    99sidude Moderator Moderator VIP

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    yes, you need the 99-00 si rear bracket:)
     
  9. udcivic

    udcivic SiR-G

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    ok thanks man if i have any other question ill let ya know
     
  10. udcivic

    udcivic SiR-G

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    ok now on the b18c distributor there are two plugs, and when i use the ex harness there is only one plug up at the distributor, what do i do with the extra plug? The one i am talking about is longer and more rectangular and only has two wires going to and from it.
     
  11. 99sidude

    99sidude Moderator Moderator VIP

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    Well it sounds like the motor you bought is obd-1, and yours is obd-2b. It's not going to be plug and play. You really need to find out what year your engine/ecu is before continuing. Your options are to:

    A. Buy a 99-00 si dizzy and it will plug right in
    B. Hard wire each wire on the dizzy to the correct pins on the ecu
    C. Get an obd-1 engine harness then buy a obd1-2 jumper harness.

    This is all assuming your engine is obd-1 (94-95). From what I have heard, some harness plugs are the same on obd1 and obd2, while some are different.
     
  12. udcivic

    udcivic SiR-G

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    well i just called jhpusa to verify the year and they said it is a 96-00 and its obd2
     
  13. udcivic

    udcivic SiR-G

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  14. udcivic

    udcivic SiR-G

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    ok so the engine is obd1...and i called jhpusa and they said sorry... so they said they would send me a an obd2 b18c dizzy, alternator, and injectors so my question is will this make the engine obd2 ......???????? i have been looking it up and every place i have looked they say to get the dizzy alternator and injectors....just want a second opinion. thanks guys
     
  15. 99sidude

    99sidude Moderator Moderator VIP

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    That should do it! I'd also check the iacv. I know that some newer ones are 3 wire while obd1 is 2 wire.
     
  16. udcivic

    udcivic SiR-G

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    yeah ill check that right now i have a gsr here that we are putting a top mount turbo kit on.
     
  17. udcivic

    udcivic SiR-G

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    well it looks like obd1 and obd2 both have two wires.....oh one other thing do you know anything about the JDM P72 ecu? And if so do i have to wire a crank shaft sensor in, the b18 i have dont have one but im new as this swap so just making sure. also does the jdm p72 use a 2nd o2 sensor?
     
  18. 99sidude

    99sidude Moderator Moderator VIP

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    The p72 does not have a secodary o2. My setup was an obd-1 jdm b18c I got from h-motors as well. I ran the jdm p72 until I boosted it. I didn't have to wire in a crankshaft sensor either.
     
  19. udcivic

    udcivic SiR-G

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    ok thanks for all the help man....you have helped me understand alot.
     
  20. 99sidude

    99sidude Moderator Moderator VIP

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