Slow acceleration with 90 Accord

Discussion in 'Accord' started by Pat, Aug 7, 2004.

  1. Pat

    Pat Guest

    My mother recently gave me her old 90 Accord (she bought a new one). It
    only has 100K miles and has been well maintained (and garage kept).

    Up until recently it performed fine - accelerated normally and ran well.
    However, this morning when leaving to run some errands its acceleration was
    very sluggishly at low speed. It has an automatic transmission, and it
    acted like something was slipping (the engine rpms would stay around 2000
    while the vehicle slowly accelerated). At higher speed, however, it seem to
    operate normally.

    Do anyone know what might be going on with this? Since this problem just
    started suddenly , I suspect it's something control related (maybe something
    sticking) but have no idea what.

    Thanks for any help. I appreciate it.

    Pat
     
    Pat, Aug 7, 2004
    #1
  2. Pat

    Jafir Elkurd Guest

    Sounds like you are taking off in a higher gear than 1st.
     
    Jafir Elkurd, Aug 8, 2004
    #2
  3. Pat

    TE Cheah Guest

    | > very sluggishly at low speed.

    Same in D4 & D3, with & without sport mode ? Connect a long wire &
    digital voltmeter to exhaust manifold's oxygen sensor's output
    www.flash.net/~lorint/lorin/fuel/lambda.htm & see how lean / rich fuel
    mix is.
     
    TE Cheah, Aug 8, 2004
    #3
  4. Pat

    Pat Guest

    Yes. I think that's what's happening. If I shift it to 1st then is accels
    as normal. Any ideas why it would be doing this?
     
    Pat, Aug 8, 2004
    #4
  5. Pat

    Pat Guest

    It responds the same in D4 and D3, with and without sport mode.

    Haven't tried measuring the voltage on the oxygen sensor yet (sounds scary
    ....)

    Thanks for the help. -Pat
     
    Pat, Aug 8, 2004
    #5
  6. Pat

    Jafir Elkurd Guest

    Trash in the shift soleniods, bad shift soleniods, or a bad transmission
    control unit. Does your S light come on and/or blink?
     
    Jafir Elkurd, Aug 9, 2004
    #6
  7. Pat

    Pat Guest

    Yes - the "S" light comes on and stays on as soon as the key is turned. It
    doesn't blink though.

    What next?

    Thanks for the help. -Pat
     
    Pat, Aug 9, 2004
    #7
  8. Pat

    Jafir Elkurd Guest

    Is the S button on the shift lever down? In other words, can you turn the S
    light off? If not, I would think you have a problem with the transmission
    computer.
     
    Jafir Elkurd, Aug 9, 2004
    #8
  9. Pat

    Pat Guest

    The S indicator stays on regardless of button position. I also found some
    weblinks that gives some instructions how to troubleshoot this. They're at:

    http://forum.mpt.org/messages/9/4396.html?1087400420

    http://home.earthlink.net/~michaelpkeefe/HowTo_Codes.htm

    I haven't done this yet, but if it also indicates a bad transmission
    computer, where's a good source for a replacement?


    Thanks for help.

    Pat
     
    Pat, Aug 10, 2004
    #9
  10. Pat

    Jafir Elkurd Guest

    http://www.car-part.com would be a good place to look for a used one (look
    under computer box, not engine).

    There are many online Honda dealers if you want a new one.

    I've seen some articles on repairing the box, but I'm not so inclined to
    try, when a used one is under $100.
     
    Jafir Elkurd, Aug 10, 2004
    #10
  11. Pat

    Pat Guest

    Thanks.


     
    Pat, Aug 10, 2004
    #11
  12. Pat

    Chip Stein Guest

    bad trannny control unit. replace it. or find the directions online
    for replacing the bad components, and it may last a little while.
    Chip
     
    Chip Stein, Aug 10, 2004
    #12
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