Car fuel injection system Chevrolet Lumina 1

Electronic Fuel Injection Control System — General Information
The electronic fuel injection control system ensures the optimum ratio of fuel and air in the mixture at all stages of combustion and instantly responds to...

Checking the fuel injection system
Note: The following check is performed under the condition that the fuel pump is operating and the correct fuel pressure is maintained ( see section 3 )....

Fuel Pressure Regulator and Fuel Gauge Cap (3.1L)
Note: Due to the relative ease of replacing parts, the throttle body does not need to be disconnected from the intake manifold or disassembled. However, for...

Injector housing — removal and installation (3.1 l)
14. To disconnect the connectors from the injectors, squeeze the plastic tabs and pull the connectors upwards (see illustration). 12.14 To remove any...

Throttle Position Sensor (TPS, 3.1L)
31. Remove the two screws securing the TPS sensor to the holders and remove the sensor from the throttle body. 32. If you intend to reuse the same sensor, do...

Idle Air Control Valve (IAC, 3.1L)
37. Disconnect the electrical connector from the IAC valve and remove the valve (see illustration). 12.37. The Idle Air Control (IAC) valve can be turned using...

Fuel flow meter — removal and installation (3.1 l)
46. Disconnect the electrical connectors from the injectors. 47. Remove the pressure regulator and fuel flow meter cover, cover gasket, meter outlet pipe...

Throttle Body — Removal and Installation (3.1L)
62. Disconnect all electrical connectors from the IAC valve, TPS sensor and injectors. Disconnect the wiring harness from the throttle body. 63. Disconnect the...

Adjusting the minimum idle speed (3.1 l)
Note: This adjustment should only be made if the throttle body has been replaced. The engine must be at normal operating temperature before the adjustment...

Checking the unregulated signal of the TPS sensor (3.1 L)
Note: This check should only be performed after replacing the throttle body or TPS sensor, or after the minimum idle speed adjustment has been performed. 92....

Throttle Body — Removal and Installation (3.8L)
Caution: Relieve fuel system pressure before servicing injectors, fuel pump, fuel line, fuel distributor or pressure regulator. After servicing the fuel...

Idle Air Control Valve (IAC, 3.8L)
11. Disconnect the electrical connector from the IAC valve. 12. Loosen the screws securing the IAC valve and remove the valve (see illustration). 12/13 You...

Throttle Position Sensor (TPS, 3.8L)
21. Replacement of this sensor must be carried out by car service centers equipped with the "Scan" device for correct adjustment of the TPS sensor.

Air manifold — removal and installation (3.8 l)
22. Disconnect the cable from the negative terminal of the battery. 23. Mark and disconnect any vacuum lines that may be mixed up, then remove the throttle...

Fuel distribution pipe — removal and installation (3.8 l)
Caution: Relieve fuel system pressure before servicing injectors, fuel pump, fuel rail, fuel distributor or pressure regulator (see section 2). Note: There is...

Fuel Injectors — Removal and Installation (3.8L)
Caution: To prevent contamination from entering the engine, the area around the injectors must be cleaned before servicing. 39. To remove the injectors, pull...

Fuel Pressure Regulator — Removal and Installation (3.8 L)
44. Relieve the pressure in the fuel system ( see section 2 ). 45. Clean the fuel pressure regulator ring, located directly on its top, from all dirt deposits...

Air Flow Sensor (MAF, 3.8 l)
52. Disconnect the electrical connector. 53. Remove the MAF sensor screws (see illustration) from the block. 13.53. Unscrew the screws (indicated by arrows)...

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See similar sections on Chevrolet cars:
Power unit: Injection and control system Chevrolet Tahoe 2 and 3 (2000-2014)

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