With original equipment systems, the best way to view and save this information is with a data acquisition software package like Diacom or DataMaster. Scan tools such as GM’s Tech 1 and Tech 2 (and other brands) are also useful, but not as versatile. Like a scanner, data acquisition software (which operates on either a desk top or notebook computer) receives data through a connection to the ALDL, (Assembly Line Diagnostic Link), also known as a Data Link Connector (DLC).
     Calibrating for conditions such as idle, part throttle acceleration and cruising is relatively simple because in these modes, the system is largely self-correcting. Once the O2 sensor and