Help! Mustang wont start!

[MustangLover71]

Hi....Please someone help. I have 91 mustang 5.0, manual trans with about 181,000 miles. I was taking the car on errands and on the second stop, coming back out, the car would not crank. The starter turns over strong and continues to turn over strong. There were no previous symptoms. I have replaced battery, starter, fuel pump, fuel filter, distributor, and cap, spark plugs and wires all within the last year. Spark plugs had spark...yet I suspected Ignition coil and ignition module and replaced them both. The car still won't start. I then sprayed starter fluid into the intake, the car briefly cranked and turned right off. This has been the only time it cranked up to this point. It seems that we may have eliminated spark or have we?? Soo...then I checked the fuel line below and pressure seemed fine to the touch. I checked the valve on the fuel sending line. A plentiful amount of gas came out. It seems like I have fuel at the rail and spark but still no crank. Could this still mean fuel pressure problem?? I am also wondering if ECC computer is bad. I am really stumped here....even if you have a hunch throw it my way. This is my only car and it's stuck at a shopping center parking lot waiting to be towed for abandonment. Please HELP!!! Are there things that I can check before replacing the computer?? Thank for you help in advance.