If the engine is unstable at idle speed, it is necessary to check the operation of the throttle conditions, absolute pressure and air temperature in the manifold.
Other common problems are spark plugs, idle governor and contaminated nozzle. These elements are highly dependent on the quality of the fuel, so the idle regulator and the nozzle need to be regularly cleaned.
It is also necessary to check the clearance of the valves and the reliability of the electrical connections in the power supply and engine management system.
