1993 Mazda 626 Crank but no start. Here's what I've done s

I drove my 206,000 mile, 93 626 to work just fine. Went out four hours later to leave and engine just cranked no start. I started by changing plugs, plug wires, distributor cap, and rotor. Nothing. I checked plugs and I am getting fuel. Checked spark and there still was none. Checking the fuses under the hood and the 30 amp fuse labled ENG INJ looked to be blown. That was also replaced and still no spark.

I rented a code reader from Auto Zone but unfortunatly the plug wouldn't fit my car.

I have spent a couple of hours outside in this 15 degree weather and am cold, and frustrated. Does anyone have an idea what I should try next?