Chevrolet Trax: Fuel system cleaning

NOTE: If the fuel filter is plugged, the fuel tank should be inspected internally and cleaned if necessary.

1. Drain the fuel tank. Refer to Fuel Tank Draining.
2. Remove the fuel pump module assembly. Refer to Fuel Tank Fuel Pump Module Replacement (AWD), Fuel Tank Fuel Pump Module Replacement (FWD).
3. Inspect the fuel pump module strainer. Replace the pump module assembly if the fuel strainer is contaminated.

NOTE: When flushing the fuel tank, handle the fuel and water mixture as a hazardous material. Handle the fuel and water in accordance with all applicable local, state, and federal laws and regulations.

4. Flush the fuel tank with hot water.
5. Pour the water out of the fuel sender assembly opening in the fuel tank. Rock the fuel tank in order to be sure that the removal of the water from the fuel tank is complete.
6. Allow the tank to dry completely before reassembly.
7. Disconnect the fuel feed pipe at the engine fuel rail. Refer to Plastic Collar Quick Connect Fitting Service.

NOTE: Only use oil-free compressed air to blow out the fuel pipes.

8. Clean the fuel pipes by applying air pressure in the opposite direction of the fuel flow.
9. Connect the fuel feed pipe to the engine fuel rail. Refer to Plastic Collar Quick Connect Fitting Service.
10. Install the fuel pump module assembly. Refer to Fuel Tank Fuel Pump Module Replacement (AWD), Fuel Tank Fuel Pump Module Replacement (FWD).

FUEL INJECTION FUEL RAIL ASSEMBLY REPLACEMENT

Removal Procedure

1. Disconnect battery negative cable. Refer to Battery Negative Cable Disconnection and Connection .
2. Remove engine cover. Refer to Engine Cover Replacement .
3. Remove the fuel feed pipe from fuel injection fuel rail. Refer to Fuel Feed Pipe Replacement (Engine to Tank), Fuel Feed Pipe Replacement (At Tank AWD), Fuel Feed Pipe Replacement (At Tank FWD).
4. Remove the positive crankcase ventilation pipe from the intake manifold. Refer to Positive Crankcase Ventilation Pipe Removal .

Fig. 69: Fuel Injector Wiring Harness Plugs

5. Disconnect the 4 fuel injector wiring harness plugs (2).
6. Unclip the ECM wiring harness from retainer clips (1) and the camshaft cover.

Fig. 70: Fuel Injection Fuel Rail Bolts And Ground Cable Nut

7. Remove the ground cable nut (2) and the ground cable.
8. Remove the 2 fuel injection fuel rail bolts (1).

Fig. 71: Fuel Injection Fuel Rail Assembly

9. Remove the fuel injection fuel rail assembly (1) and the 4 fuel injector seal rings (2).

Installation Procedure

Fig. 72: Fuel Injection Fuel Rail Assembly

NOTE: Lubricate the 4 fuel injector seal rings (2) with clean engine oil.

1. Install the fuel injection fuel rail assembly (1) to the intake manifold. Use NEW fuel injector seal rings (2).

Fig. 73: Fuel Injection Fuel Rail Bolts And Ground Cable Nut

CAUTION: Refer to Fastener Caution .

2. Install the 2 fuel injection fuel rail bolts (1) and tighten to 7 N.m (62 lb in).
3. Install the ground cable and the ground cable nut (2) and tighten.

Fig. 74: Fuel Injector Wiring Harness Plugs

4. Connect the 4 fuel injector wiring harness plugs (2).
5. Clip the ECM wiring harness to the retainer clip (1) and the camshaft cover.
6. Remove the positive crankcase ventilation pipe from the intake manifold. Refer to Positive Crankcase Ventilation Pipe Removal .
7. Install the fuel feed pipe to the fuel injection fuel rail. Refer to Fuel Feed Pipe Replacement (Engine to Tank), Fuel Feed Pipe Replacement (At Tank AWD), Fuel Feed Pipe Replacement (At Tank FWD).
8. Install the engine sight shield. Refer to Engine Cover Replacement .
9. Connect battery negative cable. Refer to Battery Negative Cable Disconnection and Connection

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