Evaporative Emission Control System
OPERATION
This system reduces the amount of escaping gasoline vapors. Float bowl emissions are controlled by internal carburetor modifications. Redesigned bowl vents, reduced bowl capacity, heat shields, and improved intake manifold-to-carburetor insulation reduced vapor loss into the atmosphere. The venting of fuel tank vapors into the air has been stopped by means of the carbon canister storage method. This method transfers fuel vapors to an activated carbon storage device which absorbs and stores the vapor that is emitted from the engine's induction system while the engine is not running. When the engine is running, the stored vapor is purged from the carbon storage device by the intake air flow and then consumed in the normal combustion process. As the manifold vacuum reaches a certain point, it opens a purge control valve atop the charcoal storage canister. This allows air to be drawn into the canister, thus forcing the existing fuel vapors back into the engine to be burned normally.
On 1981 and later V6s, the purge function is electronically controlled by a purge solenoid in the line which is itself controlled by the Electronic Control Module (ECM). While the system is in the Open Loop mode, the solenoid valve is energized, blocking all vacuum to the purge valve. When the system is in the Closed Loop mode, the solenoid is de-energized, thus allowing existing vacuum to operate the purge valve. This releases the trapped fuel vapor and it is forced into the induction system.
Most carbon canisters used are of the Open design, meaning that air is drawn in through the bottom (filter) of the canister. Some 1981 and later V6 canisters are of the Closed design, which means that the incoming air is drawn directly from the air cleaner.
SERVICE
See Figures 1, 2 and 3
The only service required for the evaporative emissions system is the periodic replacement of the charcoal canister filter (if so equipped). If the fuel tank cap on your car ever requires replacement, make sure that it is of the same type as the original.
CANISTER REMOVAL & INSTALLATION
All Engines Except 8-250
- Loosen the screw holding the canister retaining bracket.
- Rotate the canister retaining bracket and remove the canister.
- Tag and disconnect all hoses leading from the canister.
- Installation is in the reverse order of removal.
- Remove the relay center cover.
- Remove the two relay center bracket bolts.
- Remove the clip holding the canister purge lines to the relay center bracket.
- Disconnect the electrical connectors at the canister and then position the center relay bracket away from the top of the canister.
- Tag and disconnect all vacuum hoses at the canister; position them out of the way.
- Remove the two canister mounting bolts and then lift out the canister.
- Install the canister in the bracket as shown in the illustration.
- Install the retainer and the two bolts.
- Installation of the remaining components is in the reverse order of removal.
FILTER REPLACEMENT
- Remove the vapor canister.
- Pull the filter out from the bottom of the canister.
- Install a new filter and then replace the canister as previously detailed.
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For more car related problem troubleshooting:---
This are the sections, you can go through and click the link to read its troubleshooting.
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The car will not start?
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Car will not crank?
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Car has no spark?
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How to troubleshoot car battery?
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How to test starter solenoid?
http://schematicsdiagram.blogspot.com/2011/06/how-to-test-starter-solenoid.html
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How to test cars starter?
http://schematicsdiagram.blogspot.com/2011/06/how-to-test-cars-starter.html
How to replace starter in car?
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car will turn over but will not start?
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The Brake Indicator Light Stays On dash of car?
The ABS and Traction Control Lights stays ON dash of car?
Check Engine Light On car?
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How to replace Interior Lights on car?
Car lights not working, even after replacing the bulb/lamp?
Click this link below:--
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How to replace head lights on car?
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How to replace Parking, turn, and Brake Lights on car?
http://schematicsdiagram.blogspot.com/2011/06/how-to-replace-parking-turn-and-brake.html
How to remove the door panel on car?
How to remove the door panel on car?
How to replace power window motor in car?
How to test relays on car?
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How to troubleshoot Engine Misfires?
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The spark plug firing order for car?
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Where is the Thermostat located in car?
How to recharge AC on Auto/Truck/car?
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How to trouble shoot speedometer?
To Order car parts online:--To get heavy discount on car parts .Click this link below:----
How to Replace Coil Springs?
How to Replace an Oil Pan Gasket?
How to Replace a Fuel Injector
How to Replace a C.O.P. Type Ignition Coil?
How to Replace a Fuel Pressure Regulator?
How to Replace a Fuel Pump?
How to Replace a Rear Lift Gate Locking Mechanism?
How to Clean a Fuel System
How to Replace an Ignition Coil
How to Replace a Windshield
How to Replace a Mass Air Flow Sensor
How to Replace a Rear Distance Sensor
How to Replace a Muffler
How to Replace an Engine
How to Replace an Intake Manifold Gasket
How to Replace an Oil Pump
How to Lubricate a Brake Pedal Linkage ?
How to Replace a Windshield Wiper Motor
How to Replace a Distributor Cap
How to Replace a Door Weather Stripping
How to Replace a Freeze Plug
How to Replace a Head Gasket
How to Replace a Heater Core
How to Replace Spark Plugs?
How to Replace a Rear Axle Bearing?
How to Replace a Front Bumper Cover
How to Replace a Manual Transmission
How to Replace a Headlight Bulb
How to Replace a Headlight Switch
How to Replace Windshield Wiper Blades
How to Replace a Cooling Fan
How to Replace a Catalytic Converter
How to Replace an Engine Mount
How to Replace a Fog Light Assembly
How to Change Engine Oil and Filter
How to Replace a Power Seat Switch
How to Replace a Rear Main Seal
How to Repair a Defroster Grid
How to Replace an AWD Transfer Case
How to Replace a Plastic License Plate Bracket?
How to Replace a Power Seat Motor
How to Replace Power Steering Fluid
How to Replace a Power Window Switch
How to Replace a Quarter Glass Panel?
How to Pressure Test a Radiator and Cap
How to Replace a Radiator
How to Repair a Hood.
How to Replace an Energy Absorber
How to Replace Heater Core Hoses
How to Replace a Thermostat.
How to Rotate Tires.
How to Replace Wheel Lug Nuts
How to Replace a Tire Valve Stem
How to Change a Flat Tire
How to Replace Leaf Springs
How to Replace a Heater Control Valve
How to Replace Transmission Cooler Lines
How to Replace an Ignition Control Unit
How to Replace a Brake Hose
How to Replace a Transfer Case Rear Output Seal
How to Replace a Seat Belt and Seatbelt Retractor
How to Replace a Power Steering Rack
How to Bleed Brakes with a Tool
How to Replace a Tail Light Bulb
How to Check Automatic Transmission Fluid Level
How to Change Automatic Transmission Fluid and Filter
How to Replace Vacuum Hoses
How to Replace an Air Intake Boot
How to Replace a Valve Cover Gasket
How to Replace a Water Pump
How to Replace a Windshield Wiper Switch
How to Replace Window Run Channel Seals
How to Replace a Window Regulator
How to Balance a Tire and Wheel
How to Replace a Window Motor
How to Adjust a Hood Release Latch?
How to Replace a Radiator Support
How to Replace a Rear Pinion Seal.
How to Replace Battery Cables
How to Replace a Proportioning Valve
How to Replace an Upper Radiator Hose
How to Replace a Lower Radiator Hose
How to Replace a Timing Belt?
How to Check for Loose or Worn Suspension
How to Check for Loose Steering System
How to Replace an Oil Pressure Switch (Sensor)
How to Replace a Fender Liner or Splash Shield
How to Replace a Hood Insulator
How to Replace a Rear Differential.
How to Repair a Hood Hinge
How to Replace a Brake Pedal Return Spring
How to Replace a Door Shell.
How to Replace a Transfer Case Front Output Seal
How to Replace a Hood Latch/Lock Assembly
How to Replace a Lift Gate Strut
How to Replace Mud Flaps (Mud Guards)
How to Check Differential Oil Leaks and Replace Oil.
How to Replace a Mirror
How to Replace a Transfer Case Shift Linkage
How to Replace a Transmission Mount
How to Replace a U-Joint
How to Replace a Washer Tank
How to Replace an A/C Line or Hose
How to Replace a Heater and A/C Blower Motor
How to Replace an ABS Control Unit
How to Perform a Brake Adjustment
How to Replace an Alternator Belt
How to Replace an Emblem
How to Replace an Exhaust Manifold Gasket
How to Replace a Tail Pipe
How to Replace Shock Absorbers
How to Replace a Strut Assembly
How to Replace a Driveshaft
How to Replace a Wheel Cylinder
How to Replace a Hood
How to Replace a Brake Disc (Rotor)
How to Replace a Metal License Plate Bracket
How to Replace a Power Steering Pump
How to Perform a Basic Engine Tune-Up
How to Perform a Basic Engine Tune Up-Oil Change
How to Perform a Basic Engine Tune Up-Spark Plug and Wire Change
How to Replace a Distributor Cap and Rotor ?
How to Repair a Valance
How to Replace a Turn Signal Switch
How to Replace a Plastic Bumper Cover
How to Replace a Parking Brake Cable
How to Replace Windshield Wiper Blade Refills
How to Replace a Corner Light
How to Replace a Bumper Bracket or Side Support
How to Replace a Washer Pump.
How to Replace a Grille
How to Replace a Locking Hub
How to Replace a Fender
How to Replace a Power Steering Hose
How to Replace a Tailgate
How to Replace a Soft Top
How to Replace a Carburetor
How to Replace a Bumper Trim
How to Replace Trunk Strut
How to Replace a Front End Cover
How to Replace a Front Pipe
How to Replace an Antenna Mast
How to Replace a Side Marker Light Assembly
How to Install a Carpet on car?
How to Replace a Spoiler
How to Replace a Mirror Glass on car?
How to Replace a Step Bumper?
How to Replace a Door Lock
How to Replace a Throttle Body
How to Replace a Throttle Position Sensor
How to Replace a Grille Insert
How to Replace a Fan Shroud Assembly
How to Replace an Engine Splash Shield
How to Replace a Turn Signal Light Assembly
How to Replace a Headlight Assembly
How to Replace a Park Light Assembly
How to Replace an Expansion Tank
How to Replace an Exhaust System
How to Replace a Fender Trim
How to Replace a Headlight Door
How to Replace a Fan Shroud
How to Replace a Harmonic Balancer
How to Replace a Header Panel
How to Replace a Fuel Tank
How to Replace a Fuel Tank Cap
How to Replace a Distributor
How to Replace an EGR Valve
How to Replace an Oxygen Sensor
How to Replace an Ignition Wire Set
How to Replace a Tail Light
How to Replace a Door Handle
How to Replace a Hood Strut
How to Replace Tail Light Assembly
How to Replace a Front Bumper
How to Replace a Fuel Pump Assembly
How to Replace an Axle Assembly
How to Replace a Tailgate Handle
How to Replace a Wheel Hub Assembly
How to Replace a Control Arm
How to Replace a Window Regulator with Motor
How to Replace a Headlight
How to Check the Brake Fluid Level
How to Replace a Parking Brake Switch
How to Replace a Blower Motor Resistor
How to replace frost plug on car?
Horn stopped working?
How to clean egr valve on Isuzu Amigo?
Cruise control stopped working?
Car is stuck in park and the shift will not move?
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