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 MANUALSMAZDA1993MX-3 GS, STANDARDREPAIR AND DIAGNOSISENGINE PERFORMANCETESTING & DIAGNOSISENGINE CONTROLS - BASIC TESTING
1993 Mazda MX-3 GS, Standard
Engine Controls - Basic Testing
1993 Mazda MX-3 GS, StandardSECTION Engine Controls - Basic Testing
- Introduction
- Preliminary Inspection & Adjustments
- Fuel System
- Ignition Checks (Except NAVAJO)
- Spark
- Ignition Coil Power Source
- Ignition Coil Resistance (Except MX-3 1.8L, MX-6 & 626)
- Ignition Coil Resistance (MX-3 1.8L, MX-6 & 626)
- Optical Distributor Voltage (B2200 PFI, B2600 & MPV 2.6L)
- Distributor Pick-Up Coil Resistance (B2200 CARBURETED)
- Distributor Pick-Up Coil Resistance (MPV 3.0L)
- Crank Angle Sensor Resistance (MX-3 1.8L, MX-6 & 626 2.5L, RX7 & 929)
- Hall-Effect Sensors (MIATA, MX-3, MX-6, Protege, 323, 626 & 929)
- IGNITOR (B2200 W/Carburetor, MX-3 1.8L, MX-6 & 626)
- IGNITOR (B2200 W/PFI, B2600I, MIATA, MX-3 1.6L, Protege, 323 & 929)
- IGNITOR (MPV & 929)
- IGNITOR (RX7)
- Ignition Checks (NAVAJO)
- Notes
- Initial Test
- Check Profile Ignition Pickup (Pip) At ICM
- Isolate ICM/Pip Fault
- Checking Plugs & Wires
- Check For VBAT To ICM
- Check For Ground Open To ICM
- Check VRS Resistance
- VRS Sensor
- Check VBAT For Open To Coil
- Verify Coil Operation
- Check C1, C2 & C3 At Coil Pack (Cranking)
- Check C1, C2 & C3 At Coil Pack (Running)
- Checking Coil Pack
- Checking ICM Control
- Idle Speed & Ignition Timing
- 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.