How to adjust the carburetor balance of four-cylinder engine

I. Steps to adjust the balance of four-cylinder engine 1 carburetor. First, clean the carburetors, check and adjust the height of the oil level, so that the oil levels of the four carburetors are consistent, and it is best to reach the factory specified value. 2. Adjust the idle mixing ratio to make the idle mixing ratio reach the best state. It can be adjusted by observing the color of the spark plug. 2. Operation (1) Thoroughly decompose and clean the carburetor by empirical method to ensure that its parts are intact, and install a clean air filter (the operation stability and throttle responsiveness of large-displacement multi-cylinder vehicles are closely related to the air filter, but some vehicles can be installed without adjusting screws. At this time, cover the air inlet of the carburetor with a piece of cloth or sponge to make the air inlet as close to normal as possible). Connect all the pipelines correctly and completely loosen the idle screw before installing the carburetor. First look at the throttle position of the reference carburetor. Under normal circumstances, only 2/3 of the transition nozzle is pressed, and the transition nozzle is exposed 1/3. Looking at the light, there is a thick bright line under the throttle. Adjust the throttles of the other three carburetors to this position, that is, the static opening of the four throttles should be adjusted to be exactly the same. Let the car warm up fully, and the water tank will feel hot. The body (carburetor) must be horizontal and upright (otherwise it cannot be adjusted correctly). Don't be afraid without back support. Just put two small stools on the rear rocker arm. You don't need an oil tank, just find a small oil pot with a bottle hanging.