- connecting or disconnecting wires of injection systems or glow plugs should only be done when the engine is not running;
- to turn the engine crankshaft (for example, to check compression), without starting the engine, you need to disconnect the fuel valve plug connector;
- the battery terminal should only be removed when the engine is not running to avoid damaging the electronic system (on a 2.9 l engine). When disconnecting the battery, please remember that the radio may have a security code installed.
When working on the injection system, observe the following precautions:
- all work on the injection system must be carried out in a clean room. Repairs outdoors should be carried out in calm weather to avoid dusting of parts;
- wipe all connections thoroughly before unscrewing;
- all removed parts should be laid out on a clean surface and covered with paper or a plastic lid. Do not use lint-free fabric for this purpose;
- all exposed or partially disassembled injection system parts should be covered appropriately or placed in a closed container if repairs are to be postponed;
- before installation, carefully check the cleanliness of all parts - they must be perfectly clean;
- if the system parts are in an open position, do not use compressed air for work in the engine compartment;
- if possible, do not move the vehicle when the injection system is disassembled;
- make sure that no fuel gets into the cooling system hoses. If contact occurs, wipe off immediately with a cloth. Damaged hoses should be replaced. Pump repair is only possible in a special workshop. A special tool is required to remove and install the pump. Setting the injection timing is carried out only on specialized service station equipment.
Note: All work described below applies only to the engine mod. 601 (2.3 l). All work on the electronic control system on the 2.9 l engine is carried out at a service station. In the further description, these cases will be indicated additionally.