What makes using OBD2 system, so much better than OBD1

Mopar General Discussions

  1. rustytoolss

    rustytoolss Well-Known Member

    Messages:
    1,867
    Likes Received:
    49
    Joined:
    Sep 26, 2013
    Location:
    Clinton, Ohio
    Local Time:
    3:43 PM
    Reading about using factory efi on an engine swap. OBD1/ OBD2 . What makes OBD2 such a better thing to do ? Also if going to OBD2, would using an A500re/A518re be the better choice ? Are the RE transmissions reliable for a DD cruiser? Does the engine ECM also control the A550re/A518re or does it use a separate control computer ?
    Asking these questions so that I know what to get as a donor vehicle,
     
    Last edited: Dec 2, 2019
  2. dano

    dano Evil Handy Man

    Messages:
    2,671
    Likes Received:
    673
    Joined:
    Aug 22, 2005
    Location:
    Gresham, Oregon
    Local Time:
    1:43 PM
    OBD means On Board Diagnostics. OBD II has far more system diagnostics than OBD I. Most OBD II systems can be flashed via a programmer (if supported by the aftermarket) where as OBD I needs a chip, reprogrammed, or replaced with a different ECU if major modifications are made like a larger cam, larger injectors, added engine displacement, etc. On the trans side I don't know, some manufactures the ECU controls the trans (if electric) and some have a Transmission Controller (TCU). If you have a donor, use all the stuff from it. Mismatch is when you get into trouble.

    This is why the LS cookie cutter stuff is so adored, the aftermarket made it like playing with Playmobile instead of a used Lego set with no instructions. But, I'm a Lego guy.
     
    • Like Like x 4
    • rustytoolss

      rustytoolss Well-Known Member

      Messages:
      1,867
      Likes Received:
      49
      Joined:
      Sep 26, 2013
      Location:
      Clinton, Ohio
      Local Time:
      3:43 PM
      How/ or where do you get an ECU flashed if you modify cam/injectors..etc ?
       
    • 67Dart273

      67Dart273 FABO Gold Member FABO Gold Member

      Messages:
      40,929
      Likes Received:
      8577
      Joined:
      Oct 14, 2010
      Location:
      Idaho
      Local Time:
      1:43 PM
      RE is controlled by the "main" computer. Also be careful, don't know about all makes and models, I had a GM car was a "half way in between" OBD1 and OBD II half the scanners on the market would not read the damn thing. I think this all happened around 95--ish for GM, don't know about Chrysler
       
    • rustytoolss

      rustytoolss Well-Known Member

      Messages:
      1,867
      Likes Received:
      49
      Joined:
      Sep 26, 2013
      Location:
      Clinton, Ohio
      Local Time:
      3:43 PM
      got to love GM, No worrys I'm a mopar guy, no GM stuff here.
       
    • toolmanmike

      toolmanmike FABO Staff Staff Member FABO Gold Member

      Messages:
      44,886
      Likes Received:
      28622
      Joined:
      Jan 18, 2006
      Location:
      Iowa
      Local Time:
      3:43 PM
      96 was the first year for OBD2. Mopar had limited information though. I hook the scanner up to my 96 Dakota and don't get much. Full blown OBD2 is a very involved system and not for the amateur. Every computer and module has a input and output. ECM, BCM, Anti-lock, TCM and the like.
       
      • Agree Agree x 1
      • rustytoolss

        rustytoolss Well-Known Member

        Messages:
        1,867
        Likes Received:
        49
        Joined:
        Sep 26, 2013
        Location:
        Clinton, Ohio
        Local Time:
        3:43 PM
        So did the 97 up systems provide more scanner information ?
         
      • toolmanmike

        toolmanmike FABO Staff Staff Member FABO Gold Member

        Messages:
        44,886
        Likes Received:
        28622
        Joined:
        Jan 18, 2006
        Location:
        Iowa
        Local Time:
        3:43 PM
        Yes as the technology caught on. It seems that every year since has gotten more complicated.
         
      • dano

        dano Evil Handy Man

        Messages:
        2,671
        Likes Received:
        673
        Joined:
        Aug 22, 2005
        Location:
        Gresham, Oregon
        Local Time:
        1:43 PM
        You find a company that supports it. Mopars I don't think were over supported. Back then I had a 92 GT mustang and Chips were common. I know Mopar had some performance ECU's.

        If your just looking to go to a modern electric controlled trans there are stand alone controllers.
         
      • RustyRatRod

        RustyRatRod Weenie idiot loser. FABO Gold Member

        Messages:
        57,370
        Likes Received:
        26846
        Joined:
        Jun 7, 2010
        Location:
        Georgia
        Local Time:
        4:43 PM
        96 was the first full year. Ford got it at the halfway mark in 95. EEC V. Also, the best answer as to which is better is "it depends". A lot of guys like the OBD1 systems. I don't know all the whys and wherefores, but they do.

        You can call the LS stuff "cookie cutter" all you want......and I guess it fits, but lemmie tell you, you talk about REAL plug and play? That's it. The 51 Chevy truck I am building right now on the 95 S10 chassis is gettin a 6.0 LS and 4L80. We have the wiring harness. I was lookin at it today. It is really badass. VERY few wires will have to be terminated. Under ten, I think. It's really nice stuff. No wonder the GM boys are flocking to it and I caint blame them. Having said all that, I still don't care for them. I respect them, sure. Matt's shop truck is a 54 Chevy. 6.2 4L80 and Ford 8.8. That thing pulled 638 HP on a chassis dyno and it almost has a stock idle. This stuff is stupid easy to get power out of.
         
        • Agree Agree x 2
        • rustytoolss

          rustytoolss Well-Known Member

          Messages:
          1,867
          Likes Received:
          49
          Joined:
          Sep 26, 2013
          Location:
          Clinton, Ohio
          Local Time:
          3:43 PM
          I'm just looking for a stock OEM EFI system to put into a restomod mid 50's wagon. I want to use a 5.2 mag/ maybe a 5.9 mag, and want to have a overdrive 500/518 trans. Modern systems. Not really looking to change cams/injectors etc. But if the OBD2 and the RE series trans are a better system in the long run. Those days of looking for big HP are behind me..I'm OK with that.
           
        • RustyRatRod

          RustyRatRod Weenie idiot loser. FABO Gold Member

          Messages:
          57,370
          Likes Received:
          26846
          Joined:
          Jun 7, 2010
          Location:
          Georgia
          Local Time:
          4:43 PM
          You need to buy a wrecked OBDII 1500 2WD Dodge truck.
           
        • Hyper_pak

          Hyper_pak Old School Chrysler Fan

          Messages:
          2,188
          Likes Received:
          1008
          Joined:
          Feb 14, 2010
          Location:
          Desoto Texas
          Local Time:
          3:43 PM
          I had OBD1 on my 89 Shelby Dakota. There was a service eng light or something like that in the dash on. Took it to the dealer and they told me after 125K there was no way to reset the lamp. He showed me where to pull the correct wire out of the underhood connector, and Poof! No more light. OBD1 was just a bandaid in the evolution.
           
        • toolmanmike

          toolmanmike FABO Staff Staff Member FABO Gold Member

          Messages:
          44,886
          Likes Received:
          28622
          Joined:
          Jan 18, 2006
          Location:
          Iowa
          Local Time:
          3:43 PM
          OBD1 was the old code 12 system. GM anyway. Jump the ALDL connector and the ''check engine" light would flash once then twice (code 12) then the trouble code then finish with the code 12 again. I will be blunt., you had better know your stuff if you attempt what you are planning.
           
        • rustytoolss

          rustytoolss Well-Known Member

          Messages:
          1,867
          Likes Received:
          49
          Joined:
          Sep 26, 2013
          Location:
          Clinton, Ohio
          Local Time:
          3:43 PM
          Whats your guys thought's on the A500RE/A518RE if using say a 97 2wd dodge truck system with the OBD2 ?
           
        • RustyRatRod

          RustyRatRod Weenie idiot loser. FABO Gold Member

          Messages:
          57,370
          Likes Received:
          26846
          Joined:
          Jun 7, 2010
          Location:
          Georgia
          Local Time:
          4:43 PM
          That was horse crap.
           
          • Agree Agree x 1
          • rustytoolss

            rustytoolss Well-Known Member

            Messages:
            1,867
            Likes Received:
            49
            Joined:
            Sep 26, 2013
            Location:
            Clinton, Ohio
            Local Time:
            3:43 PM
            I had 20 yrs in auto repair. Got out in 97. So I never worked on the OBD2 systems. I also have a 46 dodge truck that has megasquirt MS2Extra. So I've been involved with things like this before. Just not OBD2... or the RE series transmissions ,just looking for some input. Thanks
             
          • rustytoolss

            rustytoolss Well-Known Member

            Messages:
            1,867
            Likes Received:
            49
            Joined:
            Sep 26, 2013
            Location:
            Clinton, Ohio
            Local Time:
            3:43 PM
            I agree. That repair man did not know what to look for.
             
          • RustyRatRod

            RustyRatRod Weenie idiot loser. FABO Gold Member

            Messages:
            57,370
            Likes Received:
            26846
            Joined:
            Jun 7, 2010
            Location:
            Georgia
            Local Time:
            4:43 PM
            Leave it stock and probably won't have a problem. Plenty of power in an A body and the OD will be nice.
             
          • pt70

            pt70 Well-Known Member

            Messages:
            186
            Likes Received:
            107
            Joined:
            Aug 23, 2019
            Location:
            CT
            Local Time:
            4:43 PM
            Putting an OBDII system in a different vehicle is a major electronics job. As the Toolman said, it involves the PCM [power control module aka ECM], the body control module, the programmed ignition key and steering column, the air bag module, the antilock brake module, trans control module [before ~ 2003], door lock sensors, and more. And they all have to talk to each other.

            I'd put a magnum or LA in it with a carb and manifold set-up, and a 70's ECU distributor in it, and roll. There is an aftermarket shift/lock-up system for the older OD automatics [non electric].
             
            • Agree Agree x 1
            • Stephen Hotz

              Stephen Hotz FABO Gold Member FABO Gold Member

              Messages:
              1,597
              Likes Received:
              1328
              Joined:
              Dec 30, 2017
              Location:
              New Braunfels, Tx
              Local Time:
              3:43 PM
              If you have used the megasquirt systems check in with Matt Cramer at DIY autotune. There are a few guys who supposedly got a controler working for the RE trans.
              You may have to use this to work though.
              DNJ-DCF1
              Read this for explanation on operation.

              Chrysler 47RE info - MSgpio.com read only forums (Jan.15,2018)
               
            • rustytoolss

              rustytoolss Well-Known Member

              Messages:
              1,867
              Likes Received:
              49
              Joined:
              Sep 26, 2013
              Location:
              Clinton, Ohio
              Local Time:
              3:43 PM
              Did not realize it was that involved,,, thime to rethink thanks
               
            • rustytoolss

              rustytoolss Well-Known Member

              Messages:
              1,867
              Likes Received:
              49
              Joined:
              Sep 26, 2013
              Location:
              Clinton, Ohio
              Local Time:
              3:43 PM
              Don't want to use MS again
               
            • toolmanmike

              toolmanmike FABO Staff Staff Member FABO Gold Member

              Messages:
              44,886
              Likes Received:
              28622
              Joined:
              Jan 18, 2006
              Location:
              Iowa
              Local Time:
              3:43 PM
            • 67Dart273

              67Dart273 FABO Gold Member FABO Gold Member

              Messages:
              40,929
              Likes Received:
              8577
              Joined:
              Oct 14, 2010
              Location:
              Idaho
              Local Time:
              1:43 PM
              I've been unable to find any concrete info on ANYONE building a "budget" RE controller. I'm told you can put a manual VB in one, if so that is the way I'll go, the lockup and OD control are simple electrics
               
            1. This site uses cookies to help personalize content, tailor your experience and to keep you logged in if you register.
              By continuing to use this site, you are consenting to our use of cookies.