These devices, as a rule, are very expensive and are available only in specialized workshops. For this reason, this chapter only describes how to perform a general check.
1. Check battery voltage.
2. Check all fuses.
3. Disconnect all plugs and sockets of the relevant electronic system and reconnect. Make sure that the plugs and wires are firmly seated in the engine compartment.
If necessary, spray the contacts with an aerosol to improve their conductivity. Do not bend the contacts yourself.
4. Check the tightness of all wires «masses» (-), as well as the contact on their terminals.
5. Check tightness of hoses and pipelines. Pay attention to the possible presence of porosity and cracks in the hoses. Tighten loose clamps.
Attention! Do not use silicone based sealants. Silicone residues that get into the engine do not burn out and damage the lambda probe.
6. Check the condition of the low pressure hoses, as well as their fastening on the connecting fittings. It is necessary to check all hoses on the injection system and intake manifold (brake booster vacuum hose, heated air supply hose, evaporative emission system hoses).
7. Warm up the engine if it starts but runs erratically or malfunctions, and let it idle. Open the hood at the same time.
8. Spray the gaskets of the intake manifold pipes and the hoses of the units operating from reduced pressure with the so-called starting fluid. The connector for the lambda probe must then be disconnected.
If, when applying the specified liquid to a certain part, the engine speed increases, then this is the place of air leakage.
If the cause of the malfunction after performing the above steps has not been established, then read the list of possible malfunctions of the fuel injection system and how to eliminate them, and also contact the workshop to print out the trouble codes registered by the control unit. Based on the information obtained, determine the cause and check the relevant part.
Attention! In the event of a sudden failure of the fuel injection system, I first check the fuses.