OK. well blacktop ecu's will only behave nicely if every last thing is perfect, including electrical load inputs (there are 3 from memory), ac request as mentioned, and especially the o2 sensor (including the heater circuit). If these arent all hooked up, even grounded permanently if theyre not needed, then the ECU wont perform very well. I know you've taken the ISCV out of the equation here, but keep that in mind anyway. What was done with the brake booster connections? There are two normally, one from ITB#1, and one from #4. If these are teed together, each one needs a check valve, a single check valve after the tee doesnt work out that well.