Question about 1998 Ford Expedition

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98 expedition computer problem

I went to emissions and they said the computer was not ready. I drove it for about 2k miles to try and cycle it but it didnt work. I

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  • big_bob_bear Apr 24, 2009

    print out says not ready. Usually when this happens you need to drive the vehicle to reset the computer but I drove it about 2k and still the same. I drive it about 20 miles to emission test so it is at operating temp. Here in az its so hot you dont even have to run it to be at operating temp.

  • big_bob_bear Apr 30, 2009

    It is not failing the test its not even acknowleding that anything is hooked up.

  • gerry bissi May 11, 2010

    try disconnecting the battery for about 1/2 hour. This should cleqr codes and reset your computer. Truck will run rugh for about 10 miles while computer relearns your engine and sensors. report back on success.

  • gerry bissi May 11, 2010

    when it reaches operating temp, it should be ready

  • david doerfer May 11, 2010

    not ready for what???

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Then you have a bad thermostat and the computer cant pass the test when it doesnt reach operating temp it cant go in to closed loop where it burns the fuel more efficient

Posted on Apr 26, 2009

  • david doerfer May 02, 2009

    will the computer talk with a scanner that is hooked up to the diagnostic connecter?

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