I would imagine that most problems result from using standard IAT sensors which amount to not much more than coolant temperature sensors.... very slow to read change... and very susceptible to hot soak issues. The IAT sensor I've used is a fast-reading, open element GM sensor, is mounted on the side of the discharge plenum.... and is in the air stream..... that's about the only place I could put it for it to function properly:



No, it doesn't run yet. I have it all together, oil pump's primed. I "thought" I calibrated the LC-1, hooked up the laptop to the ECU, turned the ignition switch on to see if I could read the sensors...... nothing.

The laptop isn't seeing the ECU because the "switched +12v" circuit is dead. I went straight to the coil+ wire where I pulled the switched 12v and got nothing. I don't yet understand it. I tested that connection a while back to make sure I could use it as a switched source and it was hot in the RUN and START position.

The weird thing is the starter will spin the engine, but nothing at the old coil wire. I need to look at the diagram a bit to figure this out - it may be only a fuse .... but I've had enough for today. Maybe tomorrow will bring some new light.

Frank