Poor Fuel Economy
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 2002 Mazda Tribute, 2002 Mazda Protege5, 2002 Mazda Protege, 2002 Mazda Millenia, and 2002 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.
- Check for A/C condenser fan circuit malfunction.
- Check for Camshaft Position (CMP) sensor malfunction.
- Check for cooling fan circuit malfunction.
- Check for damaged trigger wheel on camshaft.
- Check for Diagnostic Trouble Codes (DTCs).
- Check for dragging brakes.
- Check for fuel pressure regulator malfunction.
- Check for fuel pulsation damper malfunction.
- Check for fuel pump malfunction.
- Check for fuel quality.
- Check for incorrect engine compression.
- Check for incorrect tire pressure (low).
- Check for incorrect transaxle or transmission fluid level (A/T).
- Check for incorrect valve timing due to jumped timing belt.
- Check for low coolant level.
- Check for Mass Airflow (MAF) sensor malfunction.
- Check for PCV valve malfunction.
- Check for restricted air filter.
- Check for restricted or plugged fuel lines.
- Check for restricted fuel filter or fuel intake sock.
- Check for restricted exhaust system.
- Check for spark plug malfunction.
- Check for spark plug wire malfunction.
- Check for Variable Resonance Induction System (VRIS) malfunction (Millenia and 626 2.5L).
- Check for Variable Tumble Control System (VTCS) malfunction (Miata 1.8L, Protege, Protege5 and 626 2.0L).
- Check for Variable Valve Timing (VVT) system malfunction.
- Check for weak spark from ignition system.