21A Fuel Supply & Return System

1. Connect a suitable pressure gauge and adapter in fuel supply hose at throttle body.
2. Start engine and note fuel pressure reading.
3. If fuel pressure is 13.5---15.5 psi, proceed to Test 22. 22A Oxygen Sensor Operation
4. If fuel pressure is below 13.5 psi, note reading and proceed to step B. 21B Checking For Low Fuel Pressure
5. If fuel pressure is above 15.5 psi, proceed to step D. 21D Checking For High Fuel Pressure