Song max turns off the fire automatically when it is idle for a few minutes.

Song max shuts down automatically after being idle for 20 minutes. Idle automatic flameout is mostly caused by throttle and idle motor. Serious carbon deposition or parts damage of throttle/idle motor may lead to this fault, and insufficient air intake is the main reason. At the same time, check the air cleaner element, intake air flow sensor, intake air pressure sensor and throttle position sensor.

Engine idle speed is poor.

Incorrect idle speed, too low and too high idle speed, soft idle speed and unstable idle speed. The structural principle of EFI engine is quite different from that of carburetor engine. There are many and complicated reasons for poor idle speed, which increases the difficulty of fault diagnosis and elimination. The reason of the idle switch signal circuit The engine control computer (ECU) judges whether the engine is in an idle state according to the potential of the idle switch signal (IDL terminal).

When the idle contact is closed and the low potential is input to the IDL terminal of ECU, ECU judges that the engine is in idle working state, so it starts the idle control program to control the engine operation. Due to improper adjustment of idle contact clearance, poor contact, damage and circuit failure, engine ECU will not be able to correctly judge idle working conditions, resulting in idle control errors and various idle failures. Therefore, attention should be paid to the inspection, and this possibility should be ruled out first.