METHOD FOR PRE-IGNITION CONTROL IN A PRE-DELIVERY PHASE

Various systems and methods are described for controlling spark plug fouling and pre-ignition in a newly manufactured vehicle. One method comprises, during a pre-delivery phase of the newly manufactured vehicle including an engine, operating the engine with a first setting for air/fuel ratio to reduce spark plug fouling, and adjusting the first setting of the air/fuel ratio responsive to pre-ignition.