Bypass Air Control (BAC) Valve Operation
Ensure engine is cold. Connect tachometer to engine. Start engine and let it idle. Idle speed should decrease as engine reaches normal operating temperature. Replace valve as necessary.
Home/Mazda/Protege/Mazda Protege BH (1994-1999)/Repair manual/Testing & Diagnostics/Engine Controls - System/component Tests - 1.8L: Overview
Contents
Wiring diagrams Section: Testing & Diagnostics- Engine Controls - Tests W/o Codes: Diagnosis
- Engine Controls - Tests W/o Codes: NVH
- Engine Controls - Tests W/o Codes: Other
- Engine Controls - Tests W/codes - 1.5L: Overview
- Engine Controls - Tests W/codes - 1.5L: Diagnosis
- Engine Controls - Tests W/codes - 1.5L: Other
- Engine Controls - Tests W/codes - 1.8L: Overview
- Engine Controls - Tests W/codes - 1.8L: Diagnosis
- Engine Controls - Tests W/codes - 1.8L: Other
- Engine Controls - System/component Tests - 1.5L: Overview
- Engine Controls - System/component Tests - 1.5L: Diagnosis
- Engine Controls - System/component Tests - 1.5L: Other
- Engine Controls - System/component Tests - 1.8L: Overview
- Engine Controls - System/component Tests - 1.8L: Diagnosis
- Engine Controls - System/component Tests - 1.8L: Other
- Abbreviations
- Accessory Drive Belts
- Adjustments
- Airbag
- Anti-Lock/traction Control
- Application
- Automatic Trans
- Axle Shafts
- Basic Trouble Shooting
- Brakes
- Charging System
- Check Lists
- Clutches Manual & Hydraulic
- Computer Relearn
- Cooling Fan
- Cruise Control Systems
- Diagnostic Connector Locations
- Door Locks & Anti-Theft Systems
- Drive Cycles
- Driveline/axles
- DTC Index
- Electrical
- Electrical Component Locations
- Emission Applications
- Engine
- Engine Performance
- Fuses & Circuit Breakers
- Gauges & Instrument Panels
- General Servicing - All Makes
- Heated Glass/defoggers
- Heater
- Identification
- Manual & Power Steering
- Manual HVAC System
- Manual Trans
- Mechanical
- Mechanical - Hydraulic
- Metric Conversions
- Mirrors
- Pin Voltage Charts
- Procedures
- Removal & Installation
- Restraints
- Sensor Range Charts
- Specifications
- Starter
- Steering
- Steering Column
- Steering Column Switches
- Steering Gear
- Sun Roof/t-Top/convertible Top
- Suspension Front
- Suspension Rear
- Testing & Diagnostics
- Theory & Operation
- Timing Belt
- Traction Control Disable
- Transmission
- Wheel Alignment
- Windows
- Wiper/washer Systems
- Wiring Diagrams - Engine Performance