Once in CLOSED loop, the ECM will use the O2 sensor data for fuel trim. In OPEN loop, the ECM is using pre-defined data tables for fuel mixture. You'll have to do this IAC and TPS back and forth a few times - eventually achieving IAC steps value of 10 to 30 with TPS value of 0.42 to 0.44 V. Probably have to adjust again - CW to lower IAC steps, CCW to increase. Once in CLOSED loop and up to temp, check IAC step value again. Once TPS is set, go ahead and re-start engine. so switch ignition to key ON, check and probably adjust TPS to get back to 0.42 to 0.44. with engine off, now have to re-check TPS value. Shut off engine - IAC motor resets position when engine is shut off. keep making minute adjsutments to get it down to 30. With engine up to temp, turn screw CW a quarter turn to start. so adjustments in closed loop about 180F or higher. Seeing your pics above, I'd conclude the factory 180F T-stat is in place. Adjustments must be done with engine at normal operating temp. Turning that screw CW will lower the IAC steps counts. suggest using the soft heat from a hair dryer to soften cap first so as to permit easier removal of the silver cap without leaving marks from hose picks or small screwdrivers. driver's side of throttle body, the adjustment screw is under that silver vinyl cap. Need to adjust throttle plate stop screw to change Idle Air Control valve steps value. that is why the engine idle RPM is at 950/1025. Idle air motor position at 69 steps or 62 steps is high. not sure why MAF value is not in parameters.but I could be thinking back to the AutoXray 5000/6000 as that is what I used when I created that parameter spreadsheet and not the current Bosch-Actron tool. Gents, glad you've rec'd your scan tools.
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