Fuel Pressure Regulator: Testing and Inspection
PRESSURE REGULATOR TESTSWARNING: Release fuel pressure. Fuel line spills and leaks are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete the "Fuel Line Safety Procedures".
Technician Safety Information
NOTE: Obtain audio anti-theft access code before disconnecting battery cables.
Fuel Line Pressure
1. Disconnect negative battery cable.
View: Fuel Pressure Gauge Connections:
2. Connect fuel pressure gauge between filter and main fuel hose.
3. Connect battery cable.
4. Start engine and run at idle.
5. Check fuel line pressure.
Pressure: 200 - 250 kPa (28 - 37 psi).
View: Pressure Regulator With Vacuum Hoses Disconnected:
6. Disconnect both vacuum hoses (A & B) from the pressure regulator and measure line pressure again.
Pressure: 260 - 320 kPa (37 - 47 psi).
7. Connect vacuum hose for port A and leave hose for port B disconnected. Measure line pressure again.
Pressure: 310 - 380 kPa (44 - 55 psi).
Hold Pressure
1. Disconnect negative battery terminal.
View: Fuel Pressure Gauge Connections:
2. Connect fuel pressure gauge between filter and main fuel hose. Install clamps as shown.
3. Connect negative battery terminal.
Use A Suitable Jumper Wire:
4. Install jumper wire between data link connector F/P and GND terminals.
5. Turn ignition ON for 10 seconds to operate fuel pump.
6. Turn ignition OFF and remove jumper wire.
7. Pinch fuel delivery hose with pliers.
8. Observe fuel pressure for 5 minutes. It should be more than 150 kPa (21 psi).
9. If not as specified, replace pressure regulator.