91 5.0 LX, ran fine yesterday but hesitated when pulling into the garage. Next morning it would crank over rapidly but won't fire. dosen't seem to be getting spark. Any ideas? Thank You.

You mean it will crank but not start ? Do you have normal compression, spark and fuel pressure ?
If the timing belt broke you won't have compression on all cylinders.

When you say won't start do you mean it will crank over but not fire off or do you mean it doesn't' turn over at all? We refer to this a "No crank no start" or "Cranks will not start"

Did you take the distributor cap off and see if it has moisture inside ?

how much is the RPM showing in the datatlogger while cranking?

Move over there's a fat guy here to help you now you must go to fordowners.com register for free then search for your owners manual you can download it for free then go to roadside emergencies and look for your fuse box diagram there will be the fuse location for the fuel injection and there's a relay for them to I believe

If it was running yesterday and only cranks this morning you need to determine which you are missing - spark or fuel. The spark is easy - pull a plug and let it spark to the frame. while cranking. If you have spark then you have to start checking the fuel system.

you need to put it on a scanner to what the code is ( that is why the ck engine light is on ) then if you give me the code we can go further

After it fired right up, it stopped working? Check your fuel pressure as your fuel pump may have quit working.

I’m happy to help further over the phone at https://www.6ya.com/expert/jeremy_69f3cc28d95bf514

the most common cause of this is loss of the fuel pump pressure

check the fuses and connector wires everywhere under hood. that what i think of.