Onvehicle Inspection

1. CHECK FUEL PUMP OPERATION

(a) Using SST, connect terminals +B and FP of the check connector.

SST 09843-18020

(b) Turn the ignition switch ON. NOTICE: Do not start the engine.

(c) Check that there is pressure in the hose from the fuel filter.

HINT: At this time, you will hear fuel return noise.

(d) Turn the ignition switch OFF.

(e) Remove SST. SST 09843-18020

If there is no pressure, check the following parts:

• Fusible links

• Wiring connections

CHECK FUEL PRESSURE

(a) Check the battery voltage above 12 volts.

(b) Disconnect the cable from the negative (-) terminal of the battery.

CAUTION: Work must be started after approx. 20 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.

(c) Remove the union bolt and two gaskets, and disconnect the fuel inlet hose from the delivery pipe.

HINT:

• Put a suitable container or shop towel under the cold start injector pipe.

• Slowly loosen the union bolt.

(d) Install SST (pressure gauge) to the delivery pipe with two new gaskets and the union bolt.

SST 09268-45012

(e) Wipe off any splattered gasoline.

Check Connector

Check Connector

(f) Using SST, connect terminals + B and FP of the check connector.

SST 09843-18020

(g) Reconnect the battery negative (-) cable.

(h) Turn the ignition switch ON.

(i) Measure the fuel pressure.

If pressure is high, replace the fuel pressure regulator.

If pressure is low, check the following parts:

• Fuel hoses and connections

• Fuel pressure regulator (j) Remove SST.

SST 09843-18020

fi5783

(k) Start the engine.

(I) Disconnect the vacuum sensing hose from the fuel pressure regulator, and plug the hose end.

(m) Measure the fuel pressure at idling.

(n) Reconnect the vacuum sensing hose to the fuel pressure regulator and plug the hose end.

(o) Measure the fuel pressure at idling.

If pressure is not as specified, check the vacuum sensing hose and fuel pressure regulator.

(p) Stop the engine. Check that the fuel pressure remains 1.5 kg/cm2 (21 psi, 147 kPa) or more for 5 minutes after the engine is turned off.

If pressure is not as specified, check the fuel pump, pressure regulatorl and/or injector.

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

SST 09268-45012

(r) Reconnect the fuel inlet hose with two new gaskets and the union bolt.

(s) Reconnect the cable to the negative (-) terminal of the battery.

CHECK FUEL PRESSURE

(a) Check the battery voltage above 12 volts.

(b) Disconnect the cable from the negative (-) terminal of the battery.

CAUTION: Work must be started after approx. 20 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.

(c) Remove the union bolt and two gaskets, and disconnect the cold start injector pipe from the delivery pipe.

HINT:

• Put a suitable container or shop towel under the cold start injector pipe.

• Slowly loosen the union bolt.

(d) Install SST (pressure gauge) to the delivery pipe with two new gaskets and the union bolt.

SST 09268-45012

(e) Wipe off any splattered gasoline.

(f) Disconnect the cold start injector connector.

(g) Using SST, connect terminals + B and FP of the check connector.

SST 09843-18020

(h) Reconnect the battery negative (-) cable.

(i) Turn the ignition switch ON.

(j) Measure the fuel pressure.

If pressure is high, replace the fuel pressure regulator.

If pressure is low, check the following parts:

• Fuel hoses and connections

• Fuel pressure regulator

(k) Remove SST. SST 09843-18020

(I) Start the engine.

(m) Disconnect the vacuum sensing hose from the fuel pressure regulator.

(n) Measure the fuel pressure at idling.

(o) Reconnect the vacuum sensing hose to the fuel pressure regulator and plug the hose end.

(p) Measure the fuel pressure at idling.

If pressure is not as specified, check the vacuum sensing hose and fuel pressure regulator.

(q) Stop the engine. Check that the fuel pressure remains 1.5 kg/cm2 (21 psi, 147 kPa) 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.

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

SST 09268-45012

(s) Reconnect the cold start injector connector.

(t) Connect the cold start injector pipe with two new gaskets and the union bolt.

(u) Reconnect the cable to the negative (-) terminal of the battery.

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