Checking the idle speed
Note: before starting the adjustment, check the condition of the spark plugs, injectors and idle speed control servo and make sure that the compression in the cylinders lies in the range from the nominal to the maximum allowable value, and that the difference in compression between the cylinders does not exceed the maximum allowable value, etc..
1. Prepare the vehicle for inspection:
- A) The engine is warmed up to a coolant temperature of 80-95°C.
- b) Lighting, cooling fan and all accessories: off.
- V) Gearbox: Neutral (selector lever in position "R" or "N" for models with automatic transmission).
- G) Steering wheel: in straight ahead position.
2. Connect the control tachometer from the side of the primary winding of the ignition coil or connect the tester to the diagnostic socket.
3. Start the engine and let it idle.
4. Run the engine at approximately 2000-3000 rpm for 5 seconds or more.
5. Then let the engine idle for 2 minutes.
6. Read off the idle speed.
Idle speed:
- Engine 2.0L:
- Models with automatic transmission: 750±100 rpm
- Models with manual transmission: 800±100 rpm
- 2.4L engine: 700±100 rpm
- 2.7L engine: 850±100 rpm
7. Check the ignition timing.
Basic ignition timing:
- 2.0L engine: 5°±2°to TDC
- Engine 2.4 l: 7°± 5°to TDC
- Engine 2.7 l: 12°± 5°to TDC
Checking the operation of the fuel pump
1. Turn the ignition key to position "OFF" (OFF).
2. Connect the power (battery voltage) to the service connector of the fuel pump to check the operation of the pump.
Note: Since the fuel pump is submerged in the fuel tank, it is difficult to hear the operation of the pump without removing the fuel filler cap.
3. Lightly pinch the high pressure fuel hose and check that fuel pressure is felt.
Engines 2.0 l / 2.4 l. | Engine 2.7 l. |
Fuel pressure check
1. Relieve residual pressure from the fuel lines and high pressure hoses as follows:
- A) Disconnect the fuel pump harness connector.
- b) Start the engine and let it run. After the engine stalls on its own, turn the ignition key to the "OFF" (OFF).
- V) Disconnect the wire from the negative battery terminal.
- G) Connect the fuel pump harness connector.
2. Turn away bolts of fastening and disconnect a fuel tube from a fuel collector.
Caution: due to residual pressure in the high pressure fuel line, cover the connection of the hose with the fuel manifold with a rag to prevent fuel splashing.
Engine 2.7 l.
3. With special tool (gauge adapter adapter) connect a pressure gauge to the fuel rail. Tighten the gauge adapter-to-fuel manifold adapter bolts to specification.
- Tightening torque: 25-35 Nm
Engines 2.0 l / 2.4 l. | Engine 2.7 l. |
4. Connect a wire to the negative plug of the storage battery.
5. Connect the power (battery voltage) to the fuel pump service connector and turn on the fuel pump. Then, after making sure that there is fuel pressure, check for fuel leaks at the connections of the pressure gauge and the elements of the special device.
6. Start the engine and let it idle.
7. Disconnect a vacuum hose from a regulator of pressure of fuel and muffle a hose a stopper. Measure the fuel pressure in the system when the engine is idling.
- Rated value: 320-350 kPa
Engines 2.0 l / 2.4 l. | Engine 2.7 l. |
8. Measure the fuel pressure with the vacuum hose connected to the fuel pressure regulator.
- Rated value: approx. 255 kPa
9. If the fuel pressure values measured in points "7" And "8", do not correspond to the nominal values, determine the possible cause of the malfunction and carry out the necessary repairs.
- A) Reduced fuel pressure.
- Clogged fuel filter (replace fuel filter).
- Fuel leaks in the fuel return line due to a loose fuel pressure regulator valve (replace fuel pressure regulator).
- b) Increased fuel pressure.
- Stuck valve in fuel pressure regulator (replace fuel pressure regulator).
- Clogged or kinked fuel return hose or tube (clean or replace the hose or tube).
- V) The same fuel pressure with the vacuum hose connected and disconnected from the fuel pressure regulator.
- Clogged or damaged vacuum hose or fuel pressure regulator fitting (replace or clean the vacuum hose or fitting).
- Stuck or loose fuel pressure regulator valve (replace fuel pressure regulator).
10. Stop the engine and check for changes in the fuel pressure gauge. The fuel system is serviceable if the pressure in the fuel line does not decrease within 5 minutes. If the pressure drops, then determine the rate of pressure drop (gradually/instantly) and troubleshoot and correct them.
- A) If, after stopping the engine, the fuel pressure drops gradually, then the injector is leaking. Replace nozzles.
- b) If, after stopping the engine, the fuel pressure drops immediately, the check valve in the fuel pump remains open.
- Replace fuel pump.
11. Release residual pressure from the high pressure fuel line.
12. Disconnect a hose, remove the manometer and the special adaptation.
Caution: due to residual pressure in the high pressure fuel line, cover the connection of the hose with the fuel manifold with a rag to prevent fuel splashing.
13. Replace the O-ring at the end of the fuel hose.
14. Connect a fuel hose to a fuel collector and tighten bolts of fastening the nominal moment.
15. Check for fuel leaks. Cleaning the throttle body (throttle zone)
Note: Disconnect the air inlet hose from the throttle body and check that the inside surface of the throttle body is not contaminated. Spray cleaning solvent inside the throttle body to remove debris.
1. Start the engine, warm it up to coolant operating temperature, and then stop the engine.
2. Disconnect the air intake hose from the throttle body.
3. Plug the bypass port in the throttle body.
Note: Do not allow washing cleaner to get inside the bypass channel.
4. Spray cleaning solvent inside the throttle body through the inlet and wait about 5 minutes. Then open the throttle and wipe it dry with a clean, soft cloth.
Caution: When spraying cleaning solvent, keep the throttle closed to prevent solvent from entering the intake manifold.
5. Start the engine. Press the accelerator pedal several times and let the engine run at idle speed for 1 minute.
6. Repeat the steps "4" And "5".
7. Open the throttle body bypass port.
8. Connect the air inlet hose.
9. Disconnect the wire from the negative battery terminal for more than 10 seconds.
Fuel level sensor replacement
1. Remove the fuel filler cap to relieve the pressure inside the fuel tank.
2. Remove the floor access hatch under the rear seat cushion.
3. Disconnect the fuel pump connector, then disconnect the fuel supply pipe and fuel return pipe from the fuel pump.
4. Turn away screws of fastening of the fuel pump, then remove the fuel pump in gathering from a fuel tank.
5. Remove the fuel level sensor from the fuel pump.
6. Check and, if necessary, replace the fuel level sensor.
Fuel filter replacement
Note: on some vehicle modifications, the fuel pump is located in the fuel tank, and is an integral part of the fuel pump assembly. In this case, the fuel pump assembly must be disassembled to replace the fuel filter.
1. Remove the fuel filler cap to relieve the pressure inside the fuel tank.
2. Raise the vehicle on a lift.
3. Release residual pressure from the high pressure fuel line.
- A) Remove the technological hatch of a floor under a pillow of a back seat.
- b) Disconnect the fuel pump connector.
- V) Start the engine and let it run. After the engine stalls on its own, turn the ignition key to the "OFF" (OFF).
- G) Disconnect the wire from the negative battery terminal.
- d) Connect the fuel pump harness connector.
4. Turn away bolts of fastening of krone-matte of the fuel filter.
5. Separate the bracket from the fuel filter.
6. Check and, if necessary, replace the fuel filter.
7. Install the bracket on the fuel filter.
8. Install the fuel filter in place and tighten the fuel filter bracket bolts to the specified torque.
- Tightening torque: 25-35 Nm
9. Connect a wire to the negative plug of the storage battery and check up absence of leaks of fuel through connections of fuel tubes.
10. Install the floor hatch.
11. Install the fuel filler cap.