Vehicle emission control system Chevrolet Tahoe 1
Location of exhaust gas toxicity reduction system units
1.1 a. Location of exhaust gas toxicity reduction system units on the 7.4 liter V8 engine. 1. Manifold Absolute Pressure Sensor (MAP sensor) 2. Oxygen sensor...
1.1 a. Location of exhaust gas toxicity reduction system units on the 7.4 liter V8 engine. 1. Manifold Absolute Pressure Sensor (MAP sensor) 2. Oxygen sensor...
On-Board Diagnostics (OBD) — Quick Facts
1. Failure of sensors and devices of some emission control systems can affect the performance of the engine. Reading diagnostic codes and accurately...
1. Failure of sensors and devices of some emission control systems can affect the performance of the engine. Reading diagnostic codes and accurately...
Processor unit (ECM)/EPROM unit/CALPAK — removal and installation
Attention! To avoid damage to the processor unit, before disconnecting the battery from ground or disconnecting the wires from the unit, turn the ignition key...
Attention! To avoid damage to the processor unit, before disconnecting the battery from ground or disconnecting the wires from the unit, turn the ignition key...
Information sensors — location, removal and installation
Coolant temperature sensor 1. When the engine is cool, press the latch (see photo) and disconnect the connector. Then unscrew the sensor. 2. Before installing...
Coolant temperature sensor 1. When the engine is cool, press the latch (see photo) and disconnect the connector. Then unscrew the sensor. 2. Before installing...
Oxygen sensor — replacement
Attention! It is recommended to unscrew the sensor after warming up the engine for 1-2 minutes. 1. Disconnect the battery from ground. 2. Raise the vehicle and...
Attention! It is recommended to unscrew the sensor after warming up the engine for 1-2 minutes. 1. Disconnect the battery from ground. 2. Raise the vehicle and...
Ignition system with electronic ignition timing control (EST system)
1. The EST ignition system works in conjunction with the ECM processor unit, providing improved engine performance, fuel economy and reduced exhaust toxicity....
1. The EST ignition system works in conjunction with the ECM processor unit, providing improved engine performance, fuel economy and reduced exhaust toxicity....
Electronic Spark Control System (ESC system)
Brief information 1. The ESC system provides a delay of up to 20° in ignition timing, reducing detonation during fuel combustion. 2. The system uses a knock...
Brief information 1. The ESC system provides a delay of up to 20° in ignition timing, reducing detonation during fuel combustion. 2. The system uses a knock...
Exhaust gas recirculation system
Models before 1995 General description 1. The recirculation system includes a recirculation valve (see photo), solenoid valve and ECM processor unit. 2. The...
Models before 1995 General description 1. The recirculation system includes a recirculation valve (see photo), solenoid valve and ECM processor unit. 2. The...
Air supply control system
1. The system provides additional air supply to the engine cylinders before it warms up. This reduces the toxicity of exhaust gases and accelerates the warming...
1. The system provides additional air supply to the engine cylinders before it warms up. This reduces the toxicity of exhaust gases and accelerates the warming...
Positive crankcase ventilation system (PCV system)
1, The positive crankcase ventilation system consists of a valve, filter and vacuum hoses (see photo). 2. Maintenance of the system consists of periodic...
1, The positive crankcase ventilation system consists of a valve, filter and vacuum hoses (see photo). 2. Maintenance of the system consists of periodic...
Air Filter Thermostat — General Information
1. The air filter thermostat stabilizes the temperature of the air supplied to the injection module on the throttle pipe. Air supply is provided by a flap,...
1. The air filter thermostat stabilizes the temperature of the air supplied to the injection module on the throttle pipe. Air supply is provided by a flap,...
Catalytic Converter — Maintenance Rules
1. Maintenance of the neutralizer comes down to periodic inspection and checking for clogging of the entire exhaust system. It is recommended to evaluate the...
1. Maintenance of the neutralizer comes down to periodic inspection and checking for clogging of the entire exhaust system. It is recommended to evaluate the...
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