Idle Speed/Throttle Actuator - Electronic: Testing and Inspection
Fuel Injection Air (FIA) Control Valve Testing1. start the engine.
2. Remove the vacuum hose from the fitting on the intake air duct, and connect a vacuum gauge to the hose.
NOTE: Engine coolant temperature must be below 149 °F (65 °C).
3. Raise and lower the engine speed. and make sure the vacuum gauge reading changes as the engine speed changes.
If vacuum reading does not change check these items:
- The vacuum lines of FIA system for misrouting, leakage, breakage and clogging.
- The FIA control valve for cracks or damage.
- The cooling system.
4. Hold the engine at 3,000 rpm with no load (in Park or neutral) until the radiator fan comes on, then let it idle and recheck.
If vacuum reading changes check these items:
- The FIA control valve for cracks or damage.
- The cooling system.