How do you adjust a Mercedes fuel distributor?
Start by turning the screw clockwise 1/64th a turn then try to start the car. To make sure, you need a 3mm hex screw. Put it into the air metering hole and push down until you get resistance. Then turn the screw GENTLY with a small amount of downward pressure.
How do you adjust fuel ratio?
Make adjustments 1/2 a turn in either direction to find the smoothest idle speed. Turn the screw counterclockwise and clockwise 1/2 a turn from the middle position and listen to the sound of the idle. Set the screw in the position where the engine’s idle sounds most even and smooth to balance the fuel mixture.
How do you adjust K Jetronic fuel injection?
Remove one injector line from the top of the fuel distributor, and while looking into the injector port in the top of the fuel distributor turn the mixture adjustment screw clockwise until the port just starts to fill with fuel then turn the mixture screw 1/2 turn counter clockwise.
How does a fuel distributor work?
The fuel distributor is mounted atop a control vane through which all intake air must pass, and the system works by varying fuel volume supplied to the injectors based on the angle of a moving vane in the air flow meter, which in turn is determined by the volume of air passing the vane, and by the control pressure.
What air fuel ratio is too rich?
Engines need a precise mixture of air and fuel to run properly. The ideal ratio, referred to as the stoichiometric ratio, is 14.7 parts air to 1 part fuel. A mixture that has less than 14.7 parts air (for example, a ratio of 12:1) is said to be “rich”.
How does K Jetronic work?
How big is the Mercedes om422 diesel engine?
Engine Mercedes OM 422 The OM422 diesel engine manufactured by Mercedes-Benz is a four-stroke V-8 cylinder engine with a volume of 14618 cubic centimeters, corresponding to 875 cubic inches. It belongs to a series of engines – 400, which added a series of 300 and began to develop in 1969.
When did the Mercedes Benz OM 422 come out?
It belongs to a series of engines – 400, which added a series of 300 and began to develop in 1969. Specifically, the OM 422 was released in 1980 and replaced the predecessor – OM 402 A, with a similar V8-cylindrical design which produced 155 hp. The entire series is as follows:
How to adjust Bosch KE3 Jetronic fuel mixture?
Mercedes suggests that special tools are required to adjust the mixture on the Bosch KE3-Jetronic (CIS-E) fuel injection, such as is used on the 1988-91 560 series motors. The dedicated shade tree mechanic can do it, but needs to be well-informed first.
What should the fuel mixture be in a Mercedes Benz?
Higher % is richer mixture (clockwise adjustment) If you can get it set a just below the 50% mark (45 – 48%) do so and leave it there. Also check the reading with the tach at 2500 rpm and see what you get. Of course, do all this with the engine at operating temp.