Fuel Injected Models
- Check battery condition.
- Check Electronic Fuel Injection (EFI) main fuse located in fuse box (if equipped).
- Ensure inertia switch circuit is not open (Navajo).
- Verify crank angle sensor has correct resistance values (MX-3 1.8L, Navajo and 929).
- Verify optical sensor is working (Miata, Protege and 323).
- Verify Hall-Effect sensor is working (MX-3 and 929).
- Check for leaky fuel injectors or pressure regulator causing warm-engine no start.
- Check main relay operation. A click should be heard from main relay as ignition switch is cycled on and off.
- Verify distributor connector parallel terminal resistance is correct.
- Ensure distributor pick-up coil resistance is correct (if equipped).
- Ensure fuel system pressure is correct.
- Ensure pressure regulator control system is okay.
- Check air intake system for restriction.
- Check EGR valve and solenoid for correct operation.
- Check for cracks and poor connections at airflow meter or throttle body.
- Ensure ignition coil has correct resistance.