1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Doing An Hf To Dx Swap Help!

Discussion in 'HYBRID -> ED-EF / DA' started by Jdubspeeds, Jun 9, 2003.

  1. Jdubspeeds

    Jdubspeeds Senior Member

    Messages:
    503
    Likes Received:
    0
    Joined:
    Jun 9, 2003
    Location:
    Tacoma Wa
    I have a 1991 crx with a hf motor in it (blown). So I got a good running 16valve dx motor outta my friends civic. I bought a 16v ECU. Is there going to be anymore problems with the swap. Someone told me something with the EGR had to be changed. Any help please doing the swap tommorow.

    -Justin
     
  2. jlicrx

    jlicrx Senior Member

    Messages:
    1,891
    Likes Received:
    65
    Joined:
    Jun 5, 2003
    Location:
    Colorado Springs
    you will need to do a reverse of the DPFI to MPFI wiring swap or you will need to swap the HF intake manifold on to the DX engine, which isn't a good solution, because of the size of the HF intake - the best solution is to find a complete Si intake manifold and bolt that to the DX engine and use the Si ECU - don't worry about the EGR valve, not on the DX or Si
     
  3. Jdubspeeds

    Jdubspeeds Senior Member

    Messages:
    503
    Likes Received:
    0
    Joined:
    Jun 9, 2003
    Location:
    Tacoma Wa
    I dont understand. Its a 1.5 dx 16v that Im putting in my hf chassis. I was told I could swap the ECU and then something with the EGR. But I wasnt aware of any other problems. Can you explain that a little better for me please. Im not going for performance its just the cheapest motor available is all. Im just fixing the car to sell it. Btw White 91 crx hf for sale in washington state. :)
     
  4. jlicrx

    jlicrx Senior Member

    Messages:
    1,891
    Likes Received:
    65
    Joined:
    Jun 5, 2003
    Location:
    Colorado Springs
    the HF is MPFI with 4 injectors, one at each cylinder - the DX is DPFI with 2 injectors on the throttle body - the distributor wiring is different - the HF throttle position sensor turns in the opposite direction from the DX - the DX engine harness is not compatible with the HF cabin harness - you would need to modify your HF engine harness
     
  5. Jdubspeeds

    Jdubspeeds Senior Member

    Messages:
    503
    Likes Received:
    0
    Joined:
    Jun 9, 2003
    Location:
    Tacoma Wa
    Ok, Does anyone know how to modify the cabin harness to work with the dx motor?
     
  6. racerxb20z

    racerxb20z Senior Member

    Messages:
    140
    Likes Received:
    0
    Joined:
    Jan 20, 2003
    Location:
    OSKOSH WI
    I tell you what I will trade you straight up all my whole dx computer wiring harness everything you will need to make it run, for your harness ecu, intake manifold, injectors and ecu.
     
  7. SleEPeR_CRX

    SleEPeR_CRX Senior Member

    Messages:
    1,226
    Likes Received:
    0
    Joined:
    Dec 22, 2002
    Location:
    Vancouver B.C. canada
    dude, dont play around with the DX, it will be worth ur $$ to sell it and buy a Si engine or a ZC, easy swap and alot more power.
     
  8. Integrex-Si

    Integrex-Si Banned

    Messages:
    53
    Likes Received:
    0
    Joined:
    May 30, 2003
    Location:
    racerville
    YEAH WHAT SLEEPER CRX SAID IS TRUE DO A ZC,MORE POWER AND WHAT PROBLY $100 OR SO MORE IF IM NOT MISTAKEN JUST THINK 1 OR 2 MORE HUNDRED DOLLORS FOR ABOT 30 OR MORE HORSES DX 90 HP ZC 130 BIG DIFF MONEY WELL WORTH. .....WORDS OF VENOM....
     
  9. Jdubspeeds

    Jdubspeeds Senior Member

    Messages:
    503
    Likes Received:
    0
    Joined:
    Jun 9, 2003
    Location:
    Tacoma Wa
    I bought the car to sell. I dont care about the performance I just want it to run good for as little as possible. :blink:
     
  10. xj0hnx

    xj0hnx I wanna be sedated VIP

    Messages:
    14,172
    Likes Received:
    48
    Joined:
    Nov 10, 2002
    Location:
    C.C.TX.
    THe axles on the HF are smaller and have less splines, so need to change out the hubs too.
     
  11. Jdubspeeds

    Jdubspeeds Senior Member

    Messages:
    503
    Likes Received:
    0
    Joined:
    Jun 9, 2003
    Location:
    Tacoma Wa
    Im still using the hf's transmission on the dx motor.
     
  12. xj0hnx

    xj0hnx I wanna be sedated VIP

    Messages:
    14,172
    Likes Received:
    48
    Joined:
    Nov 10, 2002
    Location:
    C.C.TX.

    Then you're good :)
     
  13. dragoncrxls

    dragoncrxls Junior Member

    Messages:
    27
    Likes Received:
    0
    Joined:
    Apr 22, 2003
    Location:
    Kansas
    I have DX parts for sale, no tranny, but I do have a good alternator, starter, and distributor. will sell cheap!! only 6 months old, then my clutch went bad along with the syncros starting to slip, so I decided to do a full swap.
     
Verification:
Draft saved Draft deleted

Share This Page