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Section 4  Fuel Pump Replacement

Figure 102

46

1. Avoid fuel ejection

2. Disconnect fuel tank hose

3. Disconnect fuel tank return hose

4. Disconnect fuel tank gas exhaust hose

5. Detach fuel pump assembly with filter screen. See (Figure 103)

Using special tool, loose fuel tank cap. Be careful not to bend the fuel

level sensor arm when pulling out fuel pump.

6. Install fuel pump assembly. See (Figure 104). Replace ring seal .

Align the tab on the fuel pump to the notch on the fuel tank port. Tighten

the fuel tank cap with special tool.

Torque: 40N. m

7. Install fuel gas exhaust hose

(a) Install return hose;

(b) Install fuel hose;

(c) Check fuel for leakage.

Figure 103

Figure 104

New  Washer

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Section 5 Fuel Emission Control System

1. Check the operation when the fuel is cut off.

(a) Warm up the engine for at least 2500rpm. Using sound grade meter, check injector's noise when running.

See (Figure 105).

(b) The noise from the injector should stop immediately after loosing the throttle. Repeat for several times.

2. Check fuel vapor emission control system. See (Figure 106)

(a) Disconnect vacuum pipe after starting the engine.

(b) Select "ACTIVE TEST" and "PURGE VSV (Vacuum Solenoid Valve)" from the display on the fault

diagnosis tester. Confirm vacuum at VSV port.

(c) Connect the vacuum pipe after completing "ACTIVE TEST".

(d)  After conducting "ECM DATA MONITOR"on the fault diagnosis tester, select "PURGE VSV" to

check operation.

(e) Start the vehicle after warming up the engine to confirm the VSV status is changed from disconnected to

connected. See (Figure 107).

3. Check the fill fuel port cap and gasket for distortion or damage. See (Figure 108)

Figure 105

 Figure 106

Figure 107

 Figure 108

Sound Grade Meter

Gasket

Ohmmeter

No trgger

Ohmmeter

Trigger

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Section 6    Carbon Canister Replacement

1. Check and replace carbon canister

(a) Eye-inspect the carbon canister for crack or damage. See (Figure 109).

(b) Check the carbon canister's operation.

1. Plug the exhaust hole. See (Figure 110).

2. Blow air in through (4.71kpa, 48kgf/cm

2

) fuel tank hole when the exhaust

hole is closed. Check and ensure air is blew out from the blow purge hole.

Replace the carbon carnister if the operation is not as specified.

3. Blow air in through the fuel tank hole. Check and ensure air flows out from

the other hole without resistance.

Replace the carbon carnister if the operation is not as specified.

(c) Clean the carbon carnister: Plug the blowing tube, bleed air in through (4.71kpa,) fuel tank hole and goes

out from the exhaust port. See (Figure 111).

Figure 110

Figure 111

2. Vacuum Solenoid Valve (VSV)

(a) Using ohmmeter, check VSV open circuit. The resistance is 27-33

¸ when the temperature is 20°. See

(Figure 112).

(b) Using ohmmeter, check VSV grounding. Replace VSV if it is continuity. See (Figure 113).

Figure 112                                                                                          Figure 113

Figure 109

Ω