Fuel Pressure: Testing and Inspection

Cold Start Valve Line:

- Check that the battery voltage is above 12 volts.
- Disconnect the cable from the negative (-) terminal of the battery.

CAUTION: Work must be started after approx. 30 seconds or longer from the time the ignition switch is turned to the LOCK position and the negative (-) terminal cable is disconnected from the battery.


- Disconnect the cold start injector connector.
- Put a suitable container or shop towel under the cold start injector pipe (No.2 fuel pipe).
- Remove the union bolt and two gaskets, and disconnect the cold start injector pipe from the cold start injector.

HINT: Slowly loosen the union bolt.

Connecting Gauge:

- Install pressure gauge to the cold start injector with three new gaskets and the union bolt.

Torque: 15 N.m (150 kgf.cm. 11 ft.lbs)

- Wipe off any splattered gasoline.

Installing Jumper Wire:

- Using a jumper wire, connect terminals + B and FP of the check connector.
- Reconnect the battery negative (-) cable.

Measuring System Pressure:

- Turn the ignition switch ON.
- Measure the fuel pressure.

Fuel pressure:
265-304 kPa (2.7-3.1 kgf/cm2, 38-44 psi)

- If pressure is high, replace the fuel pressure regulator.
- If pressure is low, check the following parts:
^ Fuel hoses and connection
^ Fuel pump
^ Fuel filter
^ Fuel pressure regulator
^ Injector

- Remove jumper wire.
- Start the engine.

Checking Pressure - No Vacuum To Regulator:

- Disconnect the vacuum sensing hose from the fuel pressure regulator, and plug the hose end.
- Measure the fuel pressure at idling.

Fuel pressure:
265-304 kPa (2.7-3.1 kgf/cm2, 38-44 psi)

Checking Pressure - Vacuum To Regulator:

- Reconnect the vacuum sensing hose to the fuel pressure regulator.
- Measure the fuel pressure at idling.

Fuel pressure:
226-265 kPa (2.3-2.6 kgf/cm2, 33-37 psi)

- If pressure is not as specified, check the vacuum sensing hose and fuel pressure regulator.
- Stop the engine. Check that the fuel pressure remains 147 kPa (1.5 kgf/cm2, 21 psi) or more for 5 minutes after the engine is turned off.
- If pressure is not as specified, check the fuel pump, pressure regulator and/or injector.



- After checking fuel pressure, disconnect the battery negative (-) cable and carefully remove gauge to prevent gasoline from splashing.


- Connect the cold start injector pipe (No.2 fuel pipe) with two new gaskets and the union bolt.

Torque: 15 N.m (150 kgf.cm, 11 ft.lbs)

- Reconnect the cold start injector connector.
- Reconnect the cable to the negative (-) terminal of the battery.
- Check for fuel leakage.