CL L4-2156cc 2.2L SOHC F22B1 MFI (1997)
Vacuum Brake Booster Check Valve: Testing and Inspection
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Disconnect the brake booster vacuum hose at the booster or at the booster side of the valve.
Check Valve Location
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Start the engine and let it idle. There should be vacuum. If no vacuum is available, the check valve is not working properly. Replace the check
valve and retest.