Fuel Delivery and Air Induction: Testing and Inspection
Testing1. Start the engine. Hold the engine at 3,000 rpm with no load (in Park or neutral) until the radiator fan comes on, then let it idle.
2. Remove the vacuum hose from the install pipe, and connect a vacuum gauge to the hose.
3. Raise and lower the engine speed, and make sure the vacuum gauge reading changes as the rpm changes.
If vacuum reading does not change check;
- the vacuum lines of FIA system for misrouting, leakage, breakage and clogging.
- the FIA control valve for cracks or damage.