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Thread: How can you tell if an ECU is bad??

  1. #1
    clutch slipping boost s1ngle's Avatar
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    How can you tell if an ECU is bad??

    just want to know if i got jacked....
    Quote Originally Posted by Qbacca
    Killed a man with a filing cabinet this morning.
    Quote Originally Posted by Qbacca
    He deserved it though, bastard was coming at me with a modular shelf.
    WTB:
    ACT streetlite flywheel
    some form of clutch, new or very gently used.
    drivers side power door and mirror in Denver, CO

  2. #2
    not OG but Old School supermac88's Avatar
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    your car will not run right at all... I don't really know what specifically you are asking
    - 1998 Jeep Grand Cherokee -
    - 1985 Honda Magna V45 Musclebike -

  3. #3
    clutch slipping boost s1ngle's Avatar
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    well, what do you mean by not run? like it wont start? check engine light on? runs bad?

    I am just curious as to what experiences others have had with Bad ecu's... what they have done. I highly doubt a bad ECU is fixable, is it?
    Quote Originally Posted by Qbacca
    Killed a man with a filing cabinet this morning.
    Quote Originally Posted by Qbacca
    He deserved it though, bastard was coming at me with a modular shelf.
    WTB:
    ACT streetlite flywheel
    some form of clutch, new or very gently used.
    drivers side power door and mirror in Denver, CO

  4. #4
    not OG but Old School supermac88's Avatar
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    no it's not really fixable the car may or may not start, and depending on what is bad with the ecu it may just run really shitty. Not sure about the CEL.
    - 1998 Jeep Grand Cherokee -
    - 1985 Honda Magna V45 Musclebike -

  5. #5
    clutch slipping boost s1ngle's Avatar
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    any more opinions?
    Quote Originally Posted by Qbacca
    Killed a man with a filing cabinet this morning.
    Quote Originally Posted by Qbacca
    He deserved it though, bastard was coming at me with a modular shelf.
    WTB:
    ACT streetlite flywheel
    some form of clutch, new or very gently used.
    drivers side power door and mirror in Denver, CO

  6. #6
    college kid lkailburn's Avatar
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    i hope you didn't get shafted bro

  7. #7
    clutch slipping boost s1ngle's Avatar
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    aww shaddup.
    Quote Originally Posted by Qbacca
    Killed a man with a filing cabinet this morning.
    Quote Originally Posted by Qbacca
    He deserved it though, bastard was coming at me with a modular shelf.
    WTB:
    ACT streetlite flywheel
    some form of clutch, new or very gently used.
    drivers side power door and mirror in Denver, CO

  8. #8
    Registered User UmaycallUsQ's Avatar
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    you can tell if you have a bad ECU, if it goes out late at night, and robs liqour stores, and wont split the winnings with you. or if you hit the brakes, and the car accelerates.

  9. #9
    Eater of Rice Paul's Avatar
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    if your ecu is dead you'd be throwing a code 0, believe me, I've had it happen.

  10. #10
    I'm made of meat! Jafro's Avatar
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    Heheh... code 0. You're right, too. Can you describe how to count the blinks for that one?

    If you have a bad ECU, then when you turn the key to the ON position without starting the engine, the CEL doesn't light up for 5 seconds like it normally does, and is supposed to. That light is an indicator that it's going through a test routine. No light=failed test routine.

    Some ECUs can be fixed. It depends on what's wrong with them. On DSMs, 90-92 turbo ECU's suffer from a few weak capacitors, which can be replace, and the ECU will work fine afterwards.
    Jafro

    1995 Eclipse GSX
    1991 Dodge Colt GL w/AWD 4g63 turbo conversion

    My YouTube channel will be on the quiz.

  11. #11
    clutch slipping boost s1ngle's Avatar
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    yep, gonna take it to a guy on monday! sounds like he has some awesome experience with ECU repair!
    Quote Originally Posted by Qbacca
    Killed a man with a filing cabinet this morning.
    Quote Originally Posted by Qbacca
    He deserved it though, bastard was coming at me with a modular shelf.
    WTB:
    ACT streetlite flywheel
    some form of clutch, new or very gently used.
    drivers side power door and mirror in Denver, CO

  12. #11
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