Fuel Injected Models: 626
- Start and warm engine to normal operating temperature. With engine idling, disconnect top hose from No. 1 purge control valve on charcoal canister. Install a vacuum gauge to hose. Increase engine speed to 2500 RPM. Ensure vacuum exceeds 5.9 in. Hg. If not, check water thermo valve. Remove vacuum gauge. Reconnect vacuum hose.
- Disconnect vacuum hose from port "B" of No. 3 purge control valve. Connect vacuum gauge and hose to valve port. See Figure
. Accelerate engine to a speed greater than 1500 RPM. Note that vacuum is present at port. If vacuum is not present, check 3-way solenoid valve, No. 3 purge control valve, and terminal "2P" at ECU.
- Remove vacuum gauge and hose. Reconnect vacuum hose to purge control valve. Disconnect fuel tank hose from charcoal canister. Connect vacuum pump/gauge to hose. Try to apply vacuum to hose. Vacuum should not be held. If vacuum is held, check 3-way valve or fuel tank hose for blockage.
Courtesy of MAZDA MOTORS CORP.