From my understanding, the Renix "scan" tool basically monitors voltages. You can get the same info using a digital volt/ohm meter. But I do recall the dealer has a special tool to drive the AIC in and out for test purposes. The only testing I was able to do with my old Renix AIC was to put a small led test light across each set of wires running to the ECM. If the light blinks, it indicates harness is probably good and that the ECM is attempting to control the AIC; you just don't know if the pulse train being sent is correct. I beleive when you turn off the ignition, there is a time delay in the actual power down of the ECM. During that time, the ECM retracts the AIC's plunger, setting up the "high" idle for the next start sequence. Possibly you could disconnect the AIC's harness after shutting down, then restart to see if the idle will stay up. It may be possible that a temp sensor, either the engine coolant or manifold air temp are telling the ECM the engine is hot. This may drive the idle to minimum. Also, since it's a stroker, you may have other issues with regard to the engines fuel/air needs that the ECM is not programed to accommodate. You may need bigger injectors and possibly a correction to the MAP signal. I'm just guessing based on my general understanding of computer controlled fuel injected engines. Since you have owned this Jeep/stroker, is this a new problem, or did it start with the installation of the stroker? Hopefully other "stroker" folks will jump in hear regarding stroker peculiarities. If I stroked my Chevy engine, I'd have to reprogram the ECM.