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    grayghost123's Avatar
    grayghost123 Posts: 3, Reputation: 1
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    #1

    Nov 16, 2008, 08:27 PM
    92 honda civic won't start until key is in run for 15-20 minutes.
    Hello I have a 92 honda civic EX. I have a problem with the car not starting for 15 to 20 minutes once I turn the car to start. The check engine light is on then once it goes out it I hear a sound as if the fuel pump kicks on and a noise coming from under the dash area then it will beable to start. I looked at the wiring and the only thing I see that could cause the problem would be the PGM-FI main relay or the ECM. I would like to know if anyone has seen this before or any feedback would be great. Thanks
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #2

    Nov 17, 2008, 07:54 AM

    Yes, your ECM is bad, which the K-Test will confirm:

    The K-Test: Remove the MAP Sensor connector and turn the ignition switch to ON (not start). Using a multimeter, check for 5 volts going between the MAP Sensor connector's reference wire (+) and ground. As you look at the connector, this is the socket on the right. Really press the black test lead into a cleaned main ECM ground on the thermostat housing. If the voltage is low, it's probably indicating ECM failure. Most failed ECMs will record a fraction of a volt. To me, the K-Test is simple, elegant, and accurate.

    Here's how to replace your ECM yourself:

    https://www.askmehelpdesk.com/cars-t...tml#post235038

    This should solve your problem.

    Afterwards, please update the K-Test Poll:

    https://www.askmehelpdesk.com/cars-t...oll-51138.html
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