Injectors can also be checked using a special pressure gauge (In workshop).
The first signs of injector problems are:
- drop in engine power;
- too much black smoke from the exhaust pipe;
- significant blue emissions when starting a cold engine;
- increased fuel consumption;
- engine overheating;
- knocking in one or more cylinders;
- misfiring.
Withdrawal
1. Clean the outside of the high pressure fuel lines with a cold cleaner.
2. Remove the high pressure fuel lines. To do this, use a wrench or wrench to unscrew the union nuts for fastening the pipelines.
Attention! Do not change the shape of the bend of the fuel lines. All high pressure fuel lines must be removed as a complete set.
3. Disconnect the fuel return hoses from the injectors.
4. Remove the cylinder head cover.
5. Unscrew the bolts securing the pressure plates of the fuel injectors (see arrows in illustration) and unscrew the injectors themselves.
4.5. Unscrew the bolts securing the pressure plates of the fuel injectors (see arrows) and unscrew the injectors
6. Cars with manual transmission. Engage 4th gear if the camshaft lobe interferes with injector removal. Move the vehicle to rotate the engine and move the cam away from the injector.
7. Cars with automatic transmission. Attach pressure plates to all injectors if one of the camshaft cams interferes with the removal of the injector. Disconnect the multi-pin plug from the injection pump. Turn on the starter so that the engine turns over and the cam does not interfere.
8. Operate the starter only after fixing all injectors with plates and after disconnecting the multi-pin plug from the injection pump.
9. Remove the heat shield from the removed nozzle.
Installation
10. Be sure to install a new heat-shielding gasket between the cylinder head and the nozzle.
11. Replace the nozzle.
12. Secure the nozzle with the pressure plate. The tightening torque for the nuts on the pressure plates of the injectors is 10 Nm.
13. Establish a cover of a head of the block of cylinders and fix it with bolts with the moment of an inhaling of 10 Nm.
14. Install fuel return lines between injectors.
15. Tighten the union nuts of the high pressure fuel lines. The tightening torque is 30 Nm.
16. To remove the nozzle with a needle lift dispenser (see illustration 4.0), which is installed in the third cylinder, do the following.
4.0. Fuel injector with needle lift sensor:
1 - heat shield
2 - sleeve
3 - locating pin (when installing, the pin must fit into the corresponding groove in the cylinder head)
17. Disconnect the brown plug 1 from the fuel injector needle lift sensor (see illustration).
4.17. Disconnect the brown plug 1 from the fuel injector needle lift sensor
18. Remove the bolts (see arrows in illustration 4.17) securing the fuel injector pressure plate and carefully remove the injector.
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