During engine operation, some malfunctions may occur:

  • - the engine does not start;
  • - the engine runs unstably;
  • - high or low crankshaft speed at idle;
  • - increased toxicity of exhaust gases.

Let's consider the causes and methods for correcting these defects and some others.

The engine does not start:

  1. Fuel supply is disrupted - Check the fuel pump fuse
  2. The fuel pump does not work - Check the condition of the contacts in the pump connections, pump relay and starting relay
  3. Valve timing is disrupted - Restore the phases at a service station
  4. The fuel system pressure relief valve is out of order - Replace the valve
  5. The fuel filter is clogged - Replace the filter
  6. The ignition system is faulty:
  7. The contact in the ignition coil and control unit circuits is broken - Restore the contact
  8. The ignition coil is out of order - Replace the coil

The engine runs unsteadily:

  1. Water entering the fuel tank - Drain the sediment from the tank
  2. Air suction through leaks in the intake system, crankcase ventilation or idle speed control - Eliminate leaks in the connections
  3. Intermittent or failure of one of the cylinders:
  • - carbon deposits on the spark plug or spark plug failure - Clean the carbon deposits or replace the spark plug
  • - broken injector contact or injector is out of order - Restore contact or replace injector
  • - spark plug tip is broken - Replace tip
  • - control unit is faulty - Replace unit

Intermittent or failure of two cylinders:

  • - ignition coil is faulty - Replace coil
  • - control unit is faulty - Replace unit

High crankshaft speed in idle mode on warm engine:

  1. Leaky connections of crankcase ventilation system hoses and idle speed control valve - Eliminate leaks in connections
  2. Idle speed control valve contact is broken or control valve is out of order - Restore contact or replace control valve
  3. Broken contact of control system sensors engine or sensor failure - Restore contact or replace faulty sensors

Increased toxicity of exhaust gases:

  1. CO regulation is disrupted - Adjust the CO content with the adjusting screw on the mass air flow sensor
  2. Valve tightness is broken - Grind the valves
  3. Worn out oil seals - Replace the seals
  4. Coolant temperature sensor contact is broken or the sensor is out of order - Restore contact or replace the sensor
  5. Worn out cylinder-piston group parts - Repair the engine

The engine does not develop full power:

  1. Air filter is dirty - Replace the filter element
  2. Fuel filter is clogged - Replace filter
  3. Air throttle valve does not open fully - Adjust throttle actuator
  4. Fuel pump performance drops - Replace pump

Engine overheating:

  1. Water pump and alternator drive belt tension is loose - Adjust belt tension
  2. Thermostat is faulty - Replace thermostat
  3. Insufficient fluid in engine cooling system - Add coolant
  4. Heavily contaminated radiator - Flush radiator with water jet
  5. Electric fan is faulty - Check fan motor, relay sensor. Replace faulty components
  6. Faulty water pump - Replace pump

Low oil pressure:

  1. Faulty or clogged oil pump pressure relief valve - Flush valve parts or replace faulty parts
  2. Engine overheating - Eliminate cause of overheating
  3. Worn oil pump parts - Replace pump
  4. Worn main bearing shells - Replace liners

Increased oil consumption:

  • Worn or coked piston rings - Repair engine
  • Broken crankcase ventilation system - Flush system parts
  • Worn oil deflector caps - Replace caps
  • Oil leak through gaskets and seals - Fix the leak, replace gaskets and seals if necessary

Knocking in the engine:

  • Hydraulic tappet is out of order - Replace the hydraulic tappet
  • Hydraulic chain tensioner is out of order - Replace the hydraulic tensioner
  • The connecting rod and piston group is worn out - Repair the engine
  • The chain tensioner shoe is worn out - Replace the shoe
  • Breakage of the valve spring - Replace the spring

The cylinder is on the crankcase ornatyp, onyn bekitu bolttaryn kataitynyz.