Regarding the Open Loop/Close Loop differences during operation: It's my understanding that during Open Loop operation (allow Closed Loop/Learning box NOT checked), the ECU fuels the system based on the Base Fuel Flow Rate table. Correct? Without the allow Learn box being checked, the WBO2 sensor feedback is not figured into the equation and the AFR is not adjusted by the ECU?
Although the WBO2 sensor output is not being able to change the AFR in Open Loop, are the numbers that it produces and that are shown on the Handheld or laptop accurate? And, since they cannot self adjust in Open Loop, they may not mirror what is programmed in the Target A/F Ratio table?
In Closed Loop (box checked), the WBO2 sensor feedback is entered into the equation, and the ECU will add/subtract fuel in an attempt to match the commanded AFR? If the above is correct, what would cause a car to run strong & smooth in Open Loop (box not checked), but not in Closed Loop? While Online, there is a noticeable difference when checking & unchecking the box. Thanks in advance for any replies.