Air Valve
- On High Altitude 1300/1500 HF and Federal/High Altitude 1500 manual transmission except HF models, disconnect both No. 26 vacuum hoses from vacuum control valve and connect them together. Disconnect air suction hose at air valve. See Fig 1 .
- If no vacuum is present, proceed to step 4). If vacuum is present at air valve, disconnect hose No. 26 at air valve and check for vacuum at hose No. 26.
- If vacuum is present, replace control switch and retest. If no vacuum is present, replace air valve and retest.
- Start engine and quickly raise engine speed to 3500 RPM. Close throttle suddenly. If there is vacuum, test is complete for 1500 except HF or, proceed to AIR CONTROL SOLENOID VALVE test on 1300/1500 HF.
- If no vacuum is present, disconnect vacuum hose No. 26 from air valve. Check for vacuum at hose No. 26 during deceleration above 3500 RPM.
- If vacuum is present, replace air valve and retest. If no vacuum is present, check vacuum line to intake manifold for leaks or blockage. If okay, replace control switch and retest.