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    eric442's Avatar
    eric442 Posts: 1, Reputation: 1
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    #1

    Jul 15, 2012, 01:34 PM
    2001 kia optima fuel pump relay causing the ecu 15amp fuse to blow
    2001 kia optima ecu 15 amp fuse blows when key is on.unplug the fuel pump relay and fuse don't blow.
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #2

    Jul 15, 2012, 01:58 PM
    Do you hear the fuel pump run, when the ignition switch is turned to ON?

    Check all under hood and under dash fuses with a test light or multimeter. Verify the wiring to the fuel pump, fuel pump relay, and ECM. Look for any shorts. You can try replacing the fuel pump relay and cleaning the main ECM ground, but my gut is that there may be a short in the ECM. ECMs can be damaged in many ways. You may need to look for a remanufactured ECM--shop for price and warranty, if necessary.

    Did you every use jumper cables to start the engine?
    RickMN's Avatar
    RickMN Posts: 244, Reputation: 52
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    #3

    Jul 15, 2012, 02:02 PM
    Read this post and check for these wires

    Kia blows ecu fuse
    TxGreaseMonkey's Avatar
    TxGreaseMonkey Posts: 16,761, Reputation: 5597
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    #4

    Jul 15, 2012, 02:19 PM
    Definitely try RickMN's suggestion, which would be a simple, inexpensive solution.
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