Sudden MPG Drop on the Loop 1604 South San Antonio Commute
A sudden MPG drop on the Loop 1604 South to Bandera Road commute traces to long-term fuel trim above plus 10% from oxygen sensor response lag, MAF sensor contamination producing airflow readings 10 to 20% below actual, and injector deposit buildup increasing pulse width beyond the OEM efficiency baseline. The MPG drop is load-specific. It […]
