Crazy idle and no shutdown on a 91 Civic

Discussion in 'Civic' started by Mauricio, Apr 12, 2007.

  1. Mauricio

    Mauricio Guest

    We have a 91 Honda Civic in which we dropped a jdm vtec engine and ECU
    in it. You know, the kind of conversion many have done before. But,
    now we are stuck with the following problem: when we start the engine,
    it will hunt between 1K and 2K rpm. Incidentally, the tach only works
    if you turn the headlight off. On the top of that, we can take the key
    off the car and it will not shutdown. So, where should I start
    checking the electrical on this car? We have spend a day testing
    every wire that goes from and to the ECU and were able to account for
    each one of them. We have also tested the ECU in another similarly
    converted car. It worked fine.

    Now, I learned this weekend that my friend -- the car owner -- had to
    cut some of the wires that lead to the bumper/headlight for one reason
    or another. But he supposedly has soldered them back. However, at this
    point I wonder if that could have caused the situation and how. If you
    have not noticed, I am shooting in all directions right now.
     
    Mauricio, Apr 12, 2007
    #1
  2. Easy to check this one: verify the engine ground is connected. Really weird
    things happen if it's missing.

    Mike
     
    Michael Pardee, Apr 12, 2007
    #2
  3. Easy to check this one: verify the engine ground is connected. Really weird
    things happen if it's missing.

    Mike
     
    Michael Pardee, Apr 12, 2007
    #3
  4. Well, we hunt the grounds down, at least the obvious things. What
    would you suggest to do next? Incidentally, we have pretty pictures and
    videos here:http://www.honda-tech.com/zeropost?cmd=tshow&id=1951579
     
    Mauricio Tavares, May 12, 2007
    #4
  5. Well, we hunt the grounds down, at least the obvious things. What
    would you suggest to do next? Incidentally, we have pretty pictures and
    videos here:http://www.honda-tech.com/zeropost?cmd=tshow&id=1951579
     
    Mauricio Tavares, May 12, 2007
    #5
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