Valves control induction of fresh air into system to prevent accumulation of fuel vapors, which could cause decay of vacuum diaphragms. May be vent valve only or combined vent and delay valve. Valves should always be mounted so ports point downward.
Home/Ford/Crown Victoria/Ford Crown Victoria I (1992-1997)/Repair manual/Theory & Operation/Vacuum Vent Valves
Contents
Section: Theory & Operation- Introduction
- 1994 Terminology
- Air Induction System
- Mark Viii
- Charge Air Cooler (cac)
- Powertrain Control Module (PCM)
- Constant Control Relay Module (ccrm)
- Variable Control Relay Module (vcrm)
- Input Devices
- Barometric Pressure (baro) Sensor
- Brake On/off (boo) Switch
- Camshaft Position (cmp) Sensor
- Clutch Pedal Position (cpp) Switch
- Coolant Temperature Sensor
- Crankshaft Position (ckp) Sensor
- Data Link Connector (dlc) & Self-Test Input (sti) Connector
- Differential Pressure Feedback EGR (dpfe) Sensor
- Exhaust Gas Recirculation Temperature (egrt) Sensor
- EGR Valve Position (evp) Sensor
- Engine Coolant Temperature (ECT) Sensor
- Flexible Fuel (ff) Sensor
- Heated Oxygen Sensor (HO2S)
- Intake Air Temperature (IAT) Sensor
- Knock Sensor (ks)
- Manifold Absolute Pressure (MAP) Sensor
- Manual Lever Position (mlp) Sensor
- Mass Airflow (MAF) Sensor
- Park/neutral Position (pnp) Switch
- Power Steering Pressure (psp) Switch
- Pressure Feedback EGR (pfe) Sensor
- Programmable Speedometer/odometer Module (psom)
- Throttle Position (tp) Sensor
- Transmission Fluid Temperature (tft) Sensor
- Transmission Speed Sensor (tss)
- Vehicle Speed Sensor (vss)
- Output Signals
- By-Pass Air (bpa) Valve
- Canister Purge Valve
- Canister Purge Solenoid Valve
- EGR System
- Fuel Injectors
- Fuel Pump
- Fuel Pressure Regulator
- Idle Air Control (iac) Solenoid
- Inertia Fuel Shutoff (ifs) Switch
- Malfunction Indicator Light
- Transmission Solenoids
- Electronic Ignition (ei) (high Data Rate) System
- Distributor Ignition (di)
- Emission Systems
- Air Cleaner Temperature Sensor
- Temperature Vacuum Switch (tvs)
- Vacuum Control Switches
- Vacuum Delay Valves
- Vacuum Reservoir
- Vacuum Restrictor
- Vacuum Vent Valves
- Air Injection Systems
- Pulsed Secondary Air Injection (pair) System
- Secondary Air Injection (air) System
- Air By-Pass (airb) Valve
- Pulsed Secondary Air Injection (pair) Valve
- Air Injection Diverter (aird) Valve
- Air Injection (air) Solenoid
- Air Pump
- Air Silencer/filter
- Check Valve
- Combination Air Injection By-Pass (airb) & Air Injection Diverter (aird) Valve
- Dual Air Control Solenoids
- EGR Valve
- EGR Modulator (egrm) Valve
- EGR Vacuum Regulator (evr) Solenoid
- Evaporative Emission System
- Carbon Canister
- Canister Purge (canp) Solenoid Valve
- Canister Purge (canp) Valve
- Fill Control/vent System
- Pressure/vacuum Relief Fuel Cap
- Rollover/vent Valve
- Vapor Vent System
- Positive Crankcase Ventilation (PCV)
- Self-Diagnostic System
- Malfunction Indicator Light (MIL)
- Miscellaneous Controls
- Solenoids
- Abbreviations
- Accessory Drive Belts
- Adjustments
- Airbag
- Anti-Lock/traction Control
- Application
- Automatic HVAC System
- Automatic Trans
- Basic Trouble Shooting
- Brakes
- Charging System
- Check Lists
- Computer Relearn
- Cooling System (mechanical)
- Cruise Control Systems
- Diagnostic Connector Locations
- Differentials & Drive Axles
- Door Locks & Anti-Theft Systems
- Driveline/axles
- Driveshaft & Universal Joints
- Electrical
- Electrical Component Locations
- Electronic Suspension
- Emission Applications
- Engine
- Engine Performance
- Exterior Lights
- Fuses & Circuit Breakers
- Gauges & Instrument Panels
- General Servicing - All Makes
- Heated Glass/defoggers
- Identification
- Manual & Power Steering
- Manual HVAC System
- MAP Guidelines
- Mechanical
- Mechanical - Hydraulic
- Metric Conversions
- Mirrors
- Oem General Information
- Pin Voltage Charts
- Procedures
- Removal & Installation
- Reset Procedures
- Seats
- Sensor Range Charts
- Specifications
- Starter
- Steering
- Steering Column
- Steering Column Switches
- Suspension Front
- Suspension Rear
- Testing & Diagnostics
- Theory & Operation
- Traction Control Disable
- Transmission
- Wheel Alignment
- Windows
- Wiper/washer Systems
- Wiring Diagrams - Engine Performance