There is no fuel in the tank
- Fill up
Preheating time too short
- Preheat until the preheat control light goes out
Cold engine start accelerator rod not pulled out
- Pull out the cold start accelerator rod
Preheating system defective
- Fix the defect
The fuel shut-off valve is loose or faulty. The valve power supply wire may be broken
- Check the fuel shut-off valve
Air in the fuel system
- Operate the starter until the pump begins to deliver fuel
The fuel supply system is faulty
- Disconnect the fuel line from the injector and make sure that fuel is coming. Check the hoses. They may be clogged, kinked. The fuel filter may be clogged. In winter, diesel fuel may become paraffinized.
High pressure fuel lines are incorrectly connected to the injectors after their dismantling
- Check the fuel line connections. Fuel line A from the high-pressure fuel pump should go to the injector of cylinder #1, B - to the injector of cylinder #3, C - to the injector of cylinder #4, D - to the injector of cylinder #2.
Fuel injection pump supply is out of adjustment
- Adjust the fuel supply of the injection pump
Defective or dirty one or more injectors. Possibly the injection pressure is incorrect
- Check and repair (in the workshop) or replace
Fuel injection pump defect
- Replace the fuel injection pump
Poor or uneven engine idle
Incorrect idle speed adjustment
- Adjust idle speed
The accelerator cable is incorrectly adjusted or its movement is difficult
- Adjust the accelerator cable or "loose" it
The fuel hose between the fuel filter and the pump is loose
- Tighten the hose mounting nuts
The rear part of the fuel injection pump has become loose or broken
- Secure the fuel injection pump
The engine mount is loose
- Tighten the engine mounting bolts and nuts on the suspension mounts
The fuel injection pump is incorrectly adjusted
- Adjust the fuel injection pump
Black, white or blue exhaust outlet
The engine is not warmed up
- Check the exhaust gas outlet after the engine reaches operating temperature
The air filter is dirty
- Clean or replace the filter
The fuel filter is dirty
- Replace the fuel filter
Maximum engine speed adjustment is out of adjustment
- Adjust engine speed
Leaky injectors
- Check the injectors and replace if necessary
The injector needle is stuck or the needle is broken
- Check the injectors and replace the faulty one
Low injection pressure
- Check the injectors and adjust the injection pressure if necessary
Low engine efficiency. The car does not develop the required speed
Short accelerator pedal travel
- Adjust the accelerator cable. The accelerator pedal stroke may have become short due to the additional mat on the floor near the pedal
The accelerator cable is not adjusted correctly
- Adjust the cable
The fuel supply lever on the high-pressure fuel pump has become loose
- Secure the lever
Maximum engine speed is not reached
- Adjust the maximum engine speed
Injector heat shield gaskets are leaky or defective
- Check the injector heat shields
Incorrect injector opening pressure
- Adjust the pressure
Increased fuel consumption
The fuel system is leaking
- Check all hoses, pipes, filter and fuel pump
The fuel return line is clogged
- Blow out the fuel return line with compressed air
Excessive idle speed
- Adjust (in the workshop)
Maximum engine speed too high
- Adjust (in the workshop)
(This article was previously published on the resource: audimanual.ru)