hyndai excel computer system and ignition

Discussion in 'General Motoring' started by sibbs, Feb 3, 2005.

  1. sibbs

    sibbs Guest


    As a young female single driver my knowledge of the mechanics of cars is
    limited. Could someone out there help me with some information.My 1991
    hyndai excel hatchback cut out and refused to resart. I got it towed to my
    mechanic who initially said it was the ignition coil that had blown. I was
    initially relieved as that didn't sound too bad., He then when to say that
    the whole computer system has failed which was what caused the igition coil
    to blow.Is it probable that the whole computer system of my car would
    fail????.I didnt even know that my car HAD a computer in it!! He has
    quoted me $763 to repair this. Is this amount reasonable. Am I being taken
    for a ride here.?? Help!! Im about to spend a lot of money and Im sure with
    a bit more information I can avoid this!
    sibbs, Feb 3, 2005
  2. sibbs

    Jim Vatunz Guest

    I think he's guessing. After he stings you $800 for a new computer and
    then finds it was the Crankshaft Position Sensor do you think he's
    going to admit his mistake? no way.
    I don't think computers on any car have a habit of failing but
    Hyundai's do have a history of troubles with the crankshaft position
    sensor. Hopefully cured now.

    One of my friends years ago had a carburetor rebuilt at a cost of $300
    to him. If the mechanic had his head screwed on he would have fixed
    the wire to the idle cutoff solenoid which had become intermittent and
    was the real villain.
    Horror story's like these are why i do all my own servicing.

    For a very plain website try
    Jim Vatunz, Feb 3, 2005
  3. I saw an article wherein it stated that well over 60% of failed computers
    returned to maker were good, simply a very common misdiagnosis. Not easy to
    Seamus J.. Wilson
    Seamus J. Wilson, Feb 3, 2005
  4. sibbs

    hyundaitech Guest

    I'm with Jim on this one. While, technically it is possible for the
    computer to damage the coil, it's so rare as to be disbelievable. I think
    the guy said: "Oh look, no spark. Needs a coil." And then when that
    didn't fix it, he moved on to another guess.

    Computer failures are very rare on Hyundai, especially on this model, so I
    expect once he hangs the computer it still won't start. If this car is
    fuel injected (I don't know what's available in Australia), I'd suspect
    the sensors in the distributor which read camshaft rotation and tell the
    computer when to fire the injectors and plugs.

    Of course, if your timing belt broke or stripped, your camshaft wouldn't
    turn. I'd hope the tech would know the sound of an engine cranking with a
    broken timing belt, but so far your story causes me doubt.
    hyundaitech, Feb 3, 2005
  5. sibbs

    Bob Bailin Guest

    Just to add to what others have already said, about 4 years ago my brother's
    91 Excel *did* need a new computer (ECU) after his alternator shorted out
    and took out a fusible link, the computer and the mass airflow sensor in
    the process. It was pretty easy to identify that the computer was dead:
    there was no code output whatsoever. After buying a rebuilt ECU online
    (about US$350) and installing it, I found out about the bad MAF sensor,
    got a replacement from a junkyard, and was on my way.

    The coil can go bad, but not all at once unless you disconnect a spark
    plug wire and try to run the car with it loose (been there, done that too).
    I'd bring your car to a Hyundai dealer, let them diagnose the problem by
    plugging in your car to their test equipment, and then decide if it's worth
    fixing. The diagnosis charge would be worth the expense in this case.

    Bob Bailin, Feb 6, 2005
  6. sibbs

    theta Guest

    Computer failure would not cause the coil to blow.
    theta, Feb 16, 2005
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