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 MANUALSMAZDA1990B2600I LE-5, 2D PICKUP, 4WD, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - SYSTEM/COMPONENT TESTS - CARBURETED
1990 Mazda B2600i LE-5, 2D Pickup, 4WD, Automatic
Engine Controls - System/Component Tests - CARBURETED
1990 Mazda B2600i LE-5, 2D Pickup, 4WD, AutomaticSECTION Engine Controls - System/Component Tests - CARBURETED
- Introduction
- Atmospheric Pressure Sensor Test
- Clutch Switch (M/T) Test
- Coolant Temperature Sensor Test
- Coolant Temperature Switch Test
- Coolant Temperature THERMOVALVE Test
- Idle Switch Test
- Inhibitor Switch (A/T) Test
- Intake Air Temperature Sensor Test
- Neutral Switch Test
- O2 Sensor Test
- Vacuum Sensor Test
- Relays & Solenoids
- Fuel System
- Fuel Control (Feedback System)
- Air/Fuel Solenoid Valve Test
- Signal Inspection Test
- Altitude Compensation System
- Fuel-Check Valve Test
- Fuel-Cut Valve Test
- Idle Speed System Test
- Ignition System
- Emission Systems & Sub-Systems
- Deceleration Control System
- Coasting Richer System Test
- Coasting Richer Solenoid Valve Test
- Coasting Advance System Test
- Dashpot Test
- Mixture Control Valve Test
- Slow Fuel-Cut System Test
- Slow Fuel-Cut Solenoid Valve Test
- Vacuum Solenoid Valve Test
- Air Injection System
- Air Control Valve No. 1 Test
- Air Control Valve No. 2 Test
- Air Control Solenoid Valve (ACV) Test
- EGR System
- Evaporative Emission Control
- Notes
- System Inspection
- Air Vent Solenoid Valve Test
- Purge Control Valve No. 1 Test
- Purge Control Valve No. 2 Test
- Purge Control Valve No. 3 Test
- Purge Solenoid Valve Test
- Purge Solenoid Valve Control Signal Test
- Hot-Idle Compensation System
- PCV Valve Test
- Positive Temperature Coefficient (PTC) Heater System
- Thermostatic Air Cleaner
- Vacuum Control Valve (VCV) System
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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.