Poor Fuel Economy: Sensor/System
WARNING: This page is about a different car, the 2003 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
- Inspect the air intake system and crankcase for air leaks.
- Inspect the crankcase ventilation valve for proper operation. Place a finger over the inlet hole in the valve end several times. The valve should snap back. If not, replace the valve.
- Inspect for an inaccurate speedometer. See appropriate ANALOG INSTRUMENT PANELS article in ACCESSORIES & EQUIPMENT.
- Use a scan tool in order to monitor the Knock Sensor (KS).