Shut off while driving and would not restart, engine cranks but does not start?

Hello,

With the key on and engine off the fuel pressure should be 48 - 55 PSI. So, you are not too far off.

This could be due to a faulty crankshaft position sensor.
Over time with heat and vibration the sensor can go bad and can send an error signal to the ECM. That can trigger the engine to shut down. After the shutdown you may or may not be able to start it back up. It will usually only crank.

Take a look at this helpful guide:

https://www.2carpros.com/articles/engine-stalls

I have attached the crank sensor replacement and relearning procedure below.

Let me know of any questions.
Thank you.

Is there a way to test the crank position sensor ?

You can test the sensor with a multimeter.
Check for resistance across the pins. If it is zero or out of limit the sensor is bad.
Also, you can check the output voltage of the sensor while the engine is cranking. Probe the multimeter lead to the wire, It should have around 200 millivolt output.

If the crankshaft senor is bad will it through a code?

It will many times but not always. Were you able to test the sensor with a multimeter?

I ordered a multimeter and code reader...code reader came , still waiting for multimeter.

Let me know how it goes.

I went ahead and replaced the crank pos sensor and still no go.

Is there a relearn process for the sensor or something I'm not doing?

There is a relearn process for the crank sensor. It will require a scan tool.
See below for the procedure.

Will this do the relearn process? Or do I need something else? I don't have a bunch of experience with the scanners and Tech stuff.

Oh, and does the car have to be running to do the relearn?

Relearn does require the engine to be running. Take a look at the instructions on the previous post above.