3.2. Malfunctions of system of injection of fuel

On cars the system of the distributed fuel injection is applied. Is called distributed injection because fuel is injected into each cylinder by a separate nozzle. The system of injection of fuel allows to reduce toxicity of the fulfilled gases at improvement of road performance of the car.
Diagnostics of system of injection by means of codes of diagnostics is described in section 10 "Electric equipment" (see. "Control system of the engine"). Removal, installation and repair of elements of a subsystem of food are described in section 5 "Engine".
During the work with system of injection surely follow the following rules.
1. Before removing any knots of a control system of injection, disconnect a wire from the minus plug of the rechargeable battery.
2. Do not launch the engine if tips of wires on the rechargeable battery are badly tightened.
3. Never disconnect the rechargeable battery from onboard network of the car at the working engine.
4. At charging of the rechargeable battery disconnect it from onboard network of the car.
5. Do not allow heating of the electronic control unit (ECU) above 65 °C in working order and above 80 °C in non-working (for example, in the drying camera). It is necessary to remove EBU from the car if this temperature is exceeded.
6. Do not disconnect from EBU and do not attach to it sockets of a plait of wires at the included ignition.
7. Before performance of arc welding on the car disconnect wires from the rechargeable battery and sockets of wires from EBU.
8. Carry out all voltage measurements the digital voltmeter which internal resistance not less than 10 megohms.
9. The electronic knots applied in system of injection are calculated on very small tension therefore the electrostatic category can easily damage them. Not to allow damage of EBU by the electrostatic category:
– do not touch with hands plugs EBU or electronic components on its payments;
– during the work with the programmable read-only memory (PROM) of the control unit do not touch chip conclusions.
The vast majority of malfunctions of system of injection of fuel is called by failure of its following sensors:
– synchronization: injection system crash, the engine is not started up;
– mass consumption of air: increase in fuel consumption, considerable deterioration in dynamics, problem with launch of the engine;
– provisions of a butterfly valve: power deceleration, breakthroughs and failures at dispersal, unstable work in the idling mode;
– temperatures of cooling liquid...
... and the air coming to cylinders: difficulties with start-up in a frost, it is necessary to warm up the engine, supporting turns by an accelerator pedal, at an overheat power significantly decreases, the detonation appears;
– detonations: the engine is very sensitive to quality of gasoline, the increased tendency to a detonation;
– phases: the increased fuel consumption, increase in toxicity of the fulfilled gases.