Pickup 4WD L4-2559cc 2.6L SOHC (4ZE1) (1988)
Measurement
Start the engine and measure fuel pressures at idling.
1.
Disconnect the vacuum hose from the pressure regulator and plug it.
Fuel Pressure
kg/cm2(psi)
Standard About 3.0 (42)
2.
Reconnect the vacuum hose to the pressure regulator
Fuel Pressure
kg/cm2(psi)
Standard About 2.5 (35)
3.
Apply battery voltage to the V.S.V. connector.
Fuel Pressure
kg/cm2(psi)
Standard About 3.0 (42)
4.
Disconnect the vacuum hose from the pressure regulator and plug it. Stop engine to check for fuel leakage and make sure that fuel pressure
remains above 2.5 kg/cm2 (35 psi) for 4 min. after engine is turned off.
Note:
The following method can be used to operate the fuel pump without running the engine.
1.
Remove the fuel pump relay from the fuse and relay box.