Rusty;

The diagram you posted is correct; but, just discussed with Tracy and understood that you should NOT use the voltage source (red lead) from the OAT sender.  I am going to pick up the +5v from Aux air 1 – he said that should be fine.

I will be doing the repair on the redrive myself – report later.

BTW; further to the pulse filtering on the MAP, I realized that on the dyno we had teed into the line between the port and the EC2 for the line to the dyno MAP readout – which has an accumulator can in the line.  Which apparently explains we were able to get pretty good slow speed running; once we got it leaned out enough.  I’m thinking that the best approach is like an R-C filter; some accumulator volume teed into the line (dead end) - capacitor, and some restrictor orifice near the EC2 connection - resistor. The question is the correct volume and restrictor size.  Don’t want to go too far and reduce the response time too much.  My guess is that a .040 restriction will have little effect; maybe .015 - .020.  The amount of flow in and out of the little sensor with MAP changes is very small.

Al