Engine fault – What`s the reason

There are next symptoms of engine fault which is possible to detect by visual, operational and audible signs.

Engine starts and immediately stalls

What is a reason of engine immediately stalls after start?

• Check the attachment of the distributor, ignition coil or generator;
• No vacuum in carburetor, vacuum hoses, intake manifold;
• Low fuel level in the tank;
• Idling running doesn`t not adjusted;
• Fuel system and fuel filter are contaminated;
• Air damper doesn`t working;
• Damage of wiring;
• Exhaust system fault;
• Fault of spark plugs;
• Incorrect valve clearances.

Misfire in the cylinders by idling.

• – Fault of spark plugs;
• – Damage of high voltage wires;
• – Oxidation of wire ends;
• – Fault of distributor breaker;
• – Short in wiring;
• – Incorrect  ignition timing;
• – Low compression in cylinders;
• – The choke does not work;
• – Unsuitability of air filters;
• – fuel nozzle clogged;

What does it mean if the silencer shots:

• –  spark plug does not work in one of the cylinders;
• – much rich mixture;

The engine runs unevenly:

• Cylinder head gasket is damaged;
• The air damper does not function;
• The fuel filter is clogged;
• Fault of spark plugs;
• Incorrect installation of the ignition timing
• Bad wiring contact;
• high voltage wire lugs are oxidized;
• fault of the ignition coil;
• exhaust gas recirculation valve is leaking;
• Clogged crankcase ventilation valve;
• The air filter is clogged;
• The fuel pump does not supply the enough amount of fuel;
• Don`t right valve clearances or the valves are loose.
• Carburetor or injectors are dirty;
• The idle running is not adjusted.

Revolutions pulsate when the accelerator is stationary:

• The fuel pump does not work  right.