Engine Cranks But Will Not Start
WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2003 Mazda Tribute, 2003 Mazda Protege5, 2003 Mazda Protege, 2003 Mazda MX-5 Miata, and 2003 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.
- Check fuel tank contents and fuel gauge accuracy. Check for dirt, water or contamination in fuel.
- Check fuel lines and fittings for leaks. If no leaks are found, check fuel delivery system for proper pressure and volumes. Reset Inertia Fuel Shutoff (IFS) switch (if necessary). Refer to INERTIA FUEL SHUTOFF SWITCH under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING - B2300, B3000, B4000 & TRIBUTE article.
- Check for damaged or contaminated fuel injector wiring harness and connector. Ensure fuel injectors pulse when engine is cranked.
- Check ignition system for strong spark at spark plugs. If spark is not present or if spark is weak, proceed to appropriate SELF-DIAGNOSTICS article.
- Check engine compression.
- Check valve timing.
- Check for overheating engine.
- Check for intake air system leak.
- Check operation of Idle Air Control (IAC) valve.
- Check for damaged or faulty crankshaft pulley and Crankshaft Position (CKP) sensor.
Repair as necessary.