['76 911S 3.0]

SAI is only used to warm up the catalytic converter on a cold start. The system needs to pass a minimum of 3 times before it will change the readiness monitor from incomplete to complete. This will probably take a few days to complete if you do not have the Porsche scan tool to force the monitor to run.

Engine must be stone cold to ensure that the system runs to completion each time. Theiceman, there is nothing wrong with forcing the monitor to run, it still performs the same test whether you meet the criterion or not to make the monitor run. Some instances where you force the monitor to run still require you to perform certain driving conditions while the monitor is running, especially the CAT monitor. SAI criterion generally looks for a change in the O2 values as the exhaust gas composition will be extremely lean with the excess air present in the exhaust.