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    tnewb860's Avatar
    tnewb860 Posts: 3, Reputation: 1
    New Member
    		  
    #1

    Nov 10, 2009, 06:44 PM
    94 honda starting trouble
    94 honda ex the fuel pump doesn't come on all the time when you turn the key there for it won't start. I changed out the main relay and the fuel pump seems to be fine. It seems like it won't start mostly on a muggy day or if it rained or if it sits for a while. I hosed the moter down to see if it could be a wire but it cranked up.
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #2

    Nov 10, 2009, 07:02 PM

    Does the CEL stay on, when the fuel pump doesn't work?

    P.S. Never hose-down your engine--major risk to shorting out the ECM, alternator, or sensors. Also, never jump your battery--same risks.
    tnewb860's Avatar
    tnewb860 Posts: 3, Reputation: 1
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    #3

    Dec 8, 2009, 05:27 PM
    Sorry my PC been down but yes the cel light stays on,big rain yesterday and today car will not start
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #4

    Dec 8, 2009, 06:15 PM

    The ECM may be failing. Perform the K-Test below:

    The K-Test: Remove the MAP Sensor connector and turn the ignition switch to ON (Position II). 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.

    In some instances, cleaning the main ECM ground solves the problem.

    If the K-Test indicates the ECM is bad, here's how to remove and replace the ECM yourself:

    https://www.askmehelpdesk.com/cars-t...tml#post235038
    tnewb860's Avatar
    tnewb860 Posts: 3, Reputation: 1
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    #5

    Dec 13, 2009, 04:15 PM
    Hi just did that test and got 5 volts, car did start twice yesterday but took some trying, but it will not satrt at all today?
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