Question about Ford Taurus X

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1999 Ford Taurus..starts, runs fine, go to store. come out cranks but won't start. Several hours later, starts fine.. What da?

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  • Gerald Gier Nov 14, 2010

    Please read the post again. The car starts and runs, which means fuel, spark, and compression. The issue is that after you run it for awhile, like going to the store, you come out and it cranks but won't start.

  • Gerald Gier Nov 14, 2010

    If it starts at all it must have compression, fuel and spark...Why just after a trip to the store and it will crank but not start

  • Gerald Gier Nov 15, 2010

    Thanks

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Hello g502.

In this case it is likely a sensor that is getting heat from the engine and going open circuit causing ignition failure.

After you shut off your car the sensors can actually get hotter because of what is called "heat soak".
This happens after you shut off the car because the heat in the combustion chamber and the cylinders is no longer being cooled by the cooling system and it continues to give off heat towards the outside of the engine.

Most suspect is a crankshaft position sensor followed by a camshaft position sensor.
The best way to verify this is to drive it to a garage where they have the tools necessary to check the output of these sensors when the problem occurs.
Tell them exactly how long you drive the car before you shut it off and how long you are in the store so they can duplicate the problem.

I hope this helps lead you to a quality repair.
Thank you for using FixYa.

KL

Posted on Nov 14, 2010

  • FUBAR Nov 15, 2010

    Thank you for the rating. It is appreciated.
    KL

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Hi, if the engine cranks over normally when you attempt to start you car, but the engine does not start, the problem may be NO FUEL, NO SPARK or NO COMPRESSION. The engine needs adequate fuel pressure, a properly timed spark and normal compression to start.

To find why the engine won't start, remove the air inlet tube from the throttle body, push the throttle open and spray a small amount of aerosol starting fluid into the engine. Crank the engine. IF it has spark and compression but NO FUEL, it will start and run a few seconds before dying. If it does NOT start, it probably has NO SPARK.

Another method to check for spark is to pull a spark plug wire off of a spark plug (if it has plug wires, coil-on-plug ignitions do not) and place the open end of the plug wire near a metal surface on the engine. Have a helper crank the engine while you watch for a spark. DO NOT hold the wire while doing this as it can shock you. If you see a spark, the problem is not spark, but most likely NO FUEL or NO COMPRESSION. If you do not see a spark, the problem is in the IGNITION CIRCUIT.

So you have to check these three things to see which is the main problem and rectify it immediately.

Posted on Nov 13, 2010

  • Tunde Autos
    Tunde Autos Nov 14, 2010

    I understand your initial post, for that moment that it cranked and did not start after coming out of the store, follow what i told you to troubleshoot the car.....

    It's still the same as long as the car cranked and did not start....

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