Fuel injection device Petrol engines from 84 to 136 hp have an electronically controlled injection device. The injection system is controlled by an electronic control unit, which...
MPI Fuel Injector (Multi Position Injection) The MPI injection device is an electronic fuel injection device that injects fuel, depending on the engine operating mode, into the intake pipe just before the intake...
Relieve pressure in the fuel system The fuel lines of the injection device are under high pressure even after the engine has stopped. Therefore, when carrying out work that requires opening the elements of...
Checking idle speed Warm up the engine to operating temperature (coolant temperature 80°-90°C). Turn off the engine. Turn off all power consumers. Set the transmission to neutral position,...
Fault memory polling If there is a defect in the MPI injection device, a warning lamp lights up on the dashboard. At the same time, the control unit switches to emergency operation and...
Checking fuel injection device sensors — air mass meter Correctly composed air-fuel mixture is obtained on the basis of information from a variety of sensors (sensitive elements). This section provides a brief description of...
Intake air temperature sensor — check The intake air temperature sensor is located on the air mass meter. This is a resistor that changes its value depending on the temperature of the intake air (thermistor)...
Air pressure sensor — check The air pressure sensor is located on the air mass meter. When engine performance deteriorates at high altitudes (starting at about 1000 m above sea level) it is safe to...
Coolant temperature sensor — check The coolant temperature sensor is mounted on the thermostat housing. The sensor resistance decreases as the coolant temperature rises. If the sensor fails, the engine...
Throttle position sensor — check The throttle position sensor is mounted on the throttle valve shaft and transmits information about the throttle position to the engine control unit. The sensor consists...
Idle speed switch — check The idle speed sensor is located on the idle speed control. The throttle lever is pressed against the idle speed sensor switch when the pedal is not depressed. By the...
Installer motor position sensor — check The setting motor position sensor is a variable resistance (potentiometer) and transmits to the control unit information about the position of the idle speed controller....
TDC sensor — check The TDC sensor is located on the distributor and sends a pulse signal to the control unit as soon as the piston of cylinder 1 is in the ignition TDC position. If the...
Crankshaft position sensor — check The crankshaft position sensor is located in the distributor, and on DOHC engines it is located instead of the distributor. It determines the position of the piston...
Vehicle speed sensor — check The vehicle speed sensor is located in the tachometer on the dashboard. With a defective sensor, the engine stalls when the car stops.
Power steering pressure switch — check The sensor is attached to the steering gearbox. When the power steering is operating, the sensor sends a signal to the engine control unit, according to which the engine...
Checking the control relay The MPI control relay is located at the rear of the center console. When the ignition is turned on, it supplies power to the control unit. 1.5L engine Remove relay....
Fuel pump check The fuel pump is located in the fuel tank. It is not necessary to remove the fuel pump to check its operation. The performance of the fuel pump must be checked if the...
Diagnostics of malfunctions of the fuel injection device In order for defects to be localized according to the following table, the following conditions must be met: there must be no errors when starting the engine. For both...