andykrow,

Have you disconnected the battery since you fired the engine?

If not, you might consider disconnecting the battery to allow the ECU to reset.  The disconnect time is usually a topic of debate, but I'd disconnect it for about 10 minutes.  I would also make sure ALL electrical components are turned off... radio, fan, lights, etc. before reconnecting the battery.

I have no idea as to the what it takes to completely reset the ECU on a 1980's 22RE.  I also don't know how much drive time it takes for the ECU to "relearn and reprogram" itself as it re-analyzes the sensor input after an ECU reset? 

Gnarls.