Car won't recognize new crankshaft sensor why

If you replace a part and it makes it worse, put the old part back in and start the diagnostics again. It is also possible to buy new sensors that are faulty, especially the ones made in Mexico! Never buy cheap sensors, buy the OEM ones that the maker used.

A $5,000 professional scan tool computer will tell you exactly what the issue is with the vehicle by reading historical and live data.

https://www.google.com/search?q=2006+Ford+Fusion+V6+won%27t+start+after+changing+the+crankshaft+position+sensors

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Unfortunately there is no circuit breaker. Without being able to see the car myself to diagnose it and based on the symptoms you state, I would say off the top of my head that there is a problem with the sensor that recognizes crankshaft position, or crankshaft position sensor as it is better known. DO NOT JUST GO AND BUY ONE. There are other tests.

When you first turn on the key without trying to start the vehicle, do you heard a very soft click after about 3-5 seconds. This is the fuel pump relay bringing the fuel system up to pressure.

If you can get someone to check to see if there are any codes stored in the computer, it would aid in my diagnosis.

when ever crankshaft position sensor replaced a crankshaft position sensor variation learning procedure should be performed the dealership has to use scanner to relearn new crankshaft sensor to the pcm so vechicle will start.

try to bypass the starter motor see the diagram attached.
If there are not function, test the ignition coil+PCM+BCM, etc any part can be faulty. see the diagram, get another information from another scanner repair shop.
God bless you

I am not sure about restart the engine,but I would check the crankshaft sensor or the crankshaft pulley...

When a crankshaft sensor has failed or is failing, certain timing problems will arise in engine function. The engine may start normally in some cases, but will cut off after a few minutes (or seconds) of operation. More than likely the engine will be unable to start at all. Since the crankshaft sensor is responsible for engine timing, the driver may experience engine backfire or irregular rpm function, if the vehicle starts at all.

the best way to fix your problem would be having OBD (on board diagnostics )pluged to your car . am asuming u didnt disconnet your baterry before u started replacing the parts which ,made faul code or codes come on. Because those are very important sensors engine won't start until u reset the codes

Crankshaft position sensor.

Check for spark. If no sparks, suspect crankshaft sensor. If sparks are good, check for vacuum leaks.
Do It Yourself Diagnosis and Repair

If you changed the camshaft and/or crankshaft sensor, it will need a CASE learn to be able to run.

It may be the crankshaft sensor.Some cars use sensors that "watch" the crankshaft.When you turn over the car the sensor sees the crankshaft moving and tells the computer to send fuel,spark,etc. I am not real keen on your particular car but it sounds like this may be your problem.