My taurus is not geting fire to the spark plugs what would cause that

Hi. This is a pretty rare situation for a taurus, no fire, (ignition) in all the taurus' I've seen only a handful have had no spark. The most likely cause of this condition is going to be a crankshaft sensor problem. But, there is also probability of having a security system locking out spark and possibly even a bad coil pack. I'd bet on the crankshaft sensor anyways, but check to see if the theft light goes on flashes rapidly when trying to start the vehicle, this will tell tale of a security problem with either the key or lock cylinder. The most common Ford no start issues I encounter almost on a daily basis would be caused by fuel pumps going bad. You should probably try and spray some carb cleaner solution into the throttle body just in case, and crank the engine over to see if it starts. I know you stateed NO FIRE but every so often I encounter a hiccup in the ECM that may be just a fuel pump shorting out signals and it turns out the fuel pump was the cause. Good luck, and let me know if you need more help.

MISFIRING MEANS PLUGS NOT FIRING WHEN IT SUPPOSE TO.IF SPARK PLUGS HAVE OVER 100000 MILES ON THEM TIME FOR NEW PLUGS AND WIRES.IF ALL IS GOOD. A BAD COIL OR DIRTY FUEL INJECTORS TO BOTH CYLINDERS WILL CAUSE MISFIRE.

Check the firing order with the firing order diagram that I have uploaded, and if that does not solve the problem then remove the spark plugs and be certain that there is an even spark plug gap between all of the spark plugs, (see the emission label under the hood for the correct spark plug gap) and be certain that there is not any split-fire or multi-fire spark plugs installed in the engine, because those plugs will not work with an OBD-II system, and a random mis-fire is the least that they will cause if installed in an OBD-II controlled vehicle.

Check obvious first, starting at plug wire, to make sure it's getting spark to plug, then pull plug to see how/if, it appears to be firing. No spark to wire, check coil. If spark is good to plug, and plug firing, time to check if fuel getting there,and if no, could be caused by faulty oxygen sensor, bad injector, just as starters.

Plug Mis-firing (firing-but not adequately) no light and no fire.
Causes: Spark plug bad, spark plug wire leaking.
If you can pull the spark plugs - and you find that one of them is wet or very dirty - compared to the others....the you have the wire/plug source identified.

Do you have the "firing order" correct? In other words, is each spark plug wire going to the same cylinder it was on before you changed the plugs? If you have done nothing else but changed the plugs then this is the most likely problem.
If when you try to start the car it backfires through the exhaust or backfires through the intake. Then this " IS" the problem. Good luck.

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It might be service time...
How old are your filters and spark plugs?
What about spark plug leads?

If a plug isn't firing properly than that means the other cylinders have to burn extra fuel to keep up with the demands from your right foot.
Which will result in far more fuel being burnt because that miss firing cylinder is having to be dragged...

That is just one possibility tho... You haven't over heated it or anything like that have you?
You haven't run it out of oil for a short time and then suddenly noticed???

Keep us posted on the progress

Attach the spark plug wires in the firing order. The firing order should be in your owner's manual. It also might have a diagram next to your ignition coil pack. The ports on the coil pack are shown by the diagram.