Fuel Pressure: Testing and Inspection
2. CHECK FUEL PRESSURE(a) Check the battery positive voltage is above 12 V.
(b) Disconnect the negative (-) terminal cable from the battery.
(c) Remove the air cleaner assembly.
(d) Remove the 2 bolts, and disconnect the engine comportment R/B No.2 from the bracket on the body.
(e) Remove the union bolt and 2 gaskets, and disconnect the fuel inlet hose from the fuel filter outlet.
CAUTION:
- Put a shop towel under the fuel filter.
- Slowly loosen the union bolt.
(f) Install the fuel inlet hose and SST (pressure gauge) to the fuel filter outlet with the 3 gaskets and SST (union bolt). SST 09268-45012
Torque: 29 N.m (300 kgf.cm, 22 ft.lbf)
(g) Wipe off any splattered gasoline.
(h) Connect the TOYOTA hand-held tester to the DLC3.
(i) Reconnect the negative (-) terminal cable to the battery.
(j) Turn the ignition switch ON.
(k) Measure the fuel pressure.
Fuel pressure: 301 - 347 kPa
(3.1 - 3.5 kgf/sq.cm, 44 - 50 psi)
If pressure is high. replace the fuel pressure regulator. If pressure is low, check these parts:
- Fuel hoses and connections
- Fuel pump
- Fuel filter
- Fuel pressure regulator
(l) Remove the TOYOTA hand-held tester from the DLC3.
(m) Start the engine.
(n) Measure the fuel pressure at idle.
Fuel pressure: 301 - 347 kPa
(3.1 - 3.5 kgf/sq.cm, 44 - 50 psi)
(o) Stop the engine.
(p) Check that the fuel pressure remains as specified for 5 minutes after the engine has stopped.
Fuel pressure: 147 kPa (1.5 kgf/sq.cm, 21 psi) or more
If pressure is not as specified. check the fuel pump, pressure regulator and/or injectors.
(q) After checking fuel pressure. disconnect the negative (-) terminal cable from the battery and carefully remove the SST to prevent gasoline from splashing.
SST 09268-45012
(r) Reconnect the fuel inlet hose with 2 new gaskets and the union bolt.
Torque: 29 N.m (300 kgf.cm, 21 ft.lbf)
(s) Reconnect the negative (-) terminal cable to the battery.
(t) Check for fuel leakage.
(u) Reinstall the engine comportment R/B No.2 and air cleaner assembly.