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.
1990 Mazda Protege LX, AutomaticFACTORY OEM SERVICE PROCEDURE
Engine Controls - Basic Testing
- Introduction
- Visual Inspection
- Mechanical Inspection
- Fuel Pressure (Carb)
- Fuel Pressure (Electrical)
- Fuel Pump (Mechanical)
- Fuel Pressure (Fuel Injection)
- Resistor Relay (RX7 Only)
- Transfer Pump (Protege 4WD Only)
- Transfer Pump Control Unit (Protege 4WD Only)
- Ignition Checks (Except RX7)
- Spark
- Ignition Coil Power Source
- Coil IGNITOR Power Source (MIATA, MX-6, Protege, 323, 626 Turbo & 929)
- Optical Distributor (B2200, B2600I, Protege, 323, & MPV 2.6L)
- Pick-Up Coil/IGNITOR (B2200, B2600I, MPV, MX-6 Non-Turbo & 626 Non-TUBBO)
- Crank Angle Sensor (MX-6 Turbo, 626 Turbo & 929)
- IGNITOR (MX-6 Turbo, 626 Turbo & 929)
- Ignition Checks (RX7 & RX7 Turbo)
- Idle Speed & Ignition Timing
- Summary
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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