Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMAZDA1991323 BASE, STANDARDREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - BASIC TESTING
1991 Mazda 323 Base, Standard
Engine Controls - Basic Testing
1991 Mazda 323 Base, StandardSECTION Engine Controls - Basic Testing
- Introduction
- Preliminary Inspection & Adjustments
- Fuel System (CARBURETED)
- Fuel System (Fuel Injection)
- Ignition Checks
- Spark (Except NAVAJO & RX7)
- Ignition Coil Power Source (Except NAVAJO & RX7)
- Ignition Coil Resistance (Except NAVAJO & RX7)
- Optical Distributor Voltage (MIATA, Protege & 323)
- Distributor Pick-Up Coil Resistance (B2200, B2600I, MPV, MX-6 Non-Turbo & 626 Non-Turbo)
- Crank Angle Sensor Resistance (MX-6 Turbo, 626 Turbo & 929)
- IGNITOR (MIATA, Protege & 323)
- IGNITOR (MX-6 Turbo, 626 Turbo & 929)
- Initial Test (NAVAJO)
- Check Profile Ignition Pickup (Pip) At EDIS Module (NAVAJO)
- Isolate EDIS Module/Pip Fault (NAVAJO)
- Check For VBAT To EDIS Module (NAVAJO)
- Check For Ground Open To EDIS Module (NAVAJO)
- Check VRS Resistance (NAVAJO)
- VRS Sensor (NAVAJO)
- Check VBAT Open To Coil (NAVAJO)
- Verify Coil Operation (NAVAJO)
- NAVAJO Check C1, C2 & C3 At Coil Pack (Cranking)
- NAVAJO Check C1, C2 & C3 At Coil Pack (Running)
- Checking Coil Pack (NAVAJO)
- Checking EDIS Control NAVAJO
- Spark (RX7)
- Leading Side IGNITOR (RX7)
- Leading Side Coil (RX7)
- Trailing Side IGNITOR (RX7)
- Trailing Side Coil (RX7)
- Crank Angle Sensor (RX7)
- Idle Speed & Ignition Timing
- Throttle Position Sensor (TPS)
- Summary
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.