geo Workshop Repair Guides

Geo Workshop Service and Repair Manuals

Idle Air Control (IAC) Valve <--> [Idle Speed/Throttle Actuator - Electronic] > < Tank Pressure Control Valve <--> [Fuel Tank Pressure Release Valve]|Testing and Inspection
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Tank Pressure Control Valve: Service and Repair

2-Way Check Valve

TANK PRESSURE CONTROL VALVE REPLACEMENT

REMOVE OR DISCONNECT

1. Fuel tank from vehicle. 
2. Two clamps and fuel vapor hoses from Tank Pressure Control (TPC) valve.
3. Two screws and TPC valve from fuel tank.

INSPECT

1. Connect a length of hose to black side of TPC valve.
2. Blow into hose; air should pass through the TPC valve.
3. Remove hose from black side and connect it to the orange side of the TPC valve.
4. Blow into hose; air should not pass through the TPC valve.

NOTE: If the TPC valve does not pass the above tests, replace the TPC valve.

INSTALL OR CONNECT

1. TPC valve to fuel tank; secure with two screws.
2. Fuel vapor hoses to TPC valve; secure with two clamps.
3. Fuel tank to vehicle. 

Idle Air Control (IAC) Valve <--> [Idle Speed/Throttle Actuator - Electronic] > < Tank Pressure Control Valve <--> [Fuel Tank Pressure Release Valve]|Testing and Inspection