5.1.2. Search and elimination of malfunctions

By search of malfunctions of the engine begin with check of working capacity and survey of the main systems. If operation of the engine, unstable frequency of rotation of a bent shaft idling or insufficient acceleration is broken, check the following main systems:

  1. Electric food
    • Battery
    • The burned-through crossing point
    • Fuse
  1. Connections with "weight"
  2. Fuel supply

  3. • Fuel-supply line
    • Fuel filter
    • Fuel pump
  1. System of ignition

  2. • Spark plug
    • High-voltage wires
    • Ignition coil
  1. System of decrease in toxicity of the fulfilled gases

  2. • System of ventilation of a case
    • Vacuum leak
  1. Others

  2. • Installation of a corner of an advancing of ignition
    • Idling rotation frequency

Malfunctions of the MFI system are often caused by bad contacts in sockets of a plait of wires. Therefore check reliability of connection of all sockets.