No Codes being read...

Re check your ecm fuse under the hood

you got the right code reader?we have the OBD1,the test port is in the engine bay,on the passanger side strut tower.

as for the fan kicking in,that sound's like something Hissin50hail2 can help you troubleshoot.

As Davis3 indicated, the ECT being unplugged can be a reason for the fan to run on low speed any time the key is on.

FYI, if you have spark and you hear solenoids engage and click, chances are decent that the EEC is ok. Try to pull your codes again. This might help

Check your TPS. Use the TPS's ground for the test (in case the ground took a dump). If your TPS signal is over about 3.7 volts, the injectors shut off.

Alternatively, use a noid light or an LED test light to check injector pulsing. You should see constant 12 volts to the injectors with the key on. It's the ground to the injectors that is pulsed. The test light or noid light will flash as you crank the engine. I am betting you dont see any flashing.

Let us know how you do and we can go from there. For whatever repair you need to make, Davis3 probably has a well-written tech note with lots of pictures.

I had a similer problem recently. I had changed the ignition coil to an MSD unit and one of the contacts in the back was slid into the holder however but was not making contact with the metal portion of the coil. The mechanic could not figure it out so I rechecked it and identified the problem. Hope this helps.