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Adjusting the carburettor

Terms of Adjustment

If your car is equipped with a system to maintain a constant idle speed, it is necessary to disconnect all electrical system and install the right front wheel before adjusting the idle speed or fuel mixture (or before adjusting ignition timing or duration of the closed condition of contacts of the breaker). Otherwise, the stabilization system is active, and adjustment is incorrect.

Disconnect the vacuum hose from the compensator system idling at high engine temperatures (if installed), and plug the pipe on the carburettor.

Adjusting the speed of the crankshaft at engine idle fuel mixture and the amount of idling (CO)

Screws of adjustment of idling

1. Screw the adjustment of the engine speed when the engine is idling 2. Screw adjusting idle mixture

PERFORMANCE ORDER

1. Increase the engine speed to 3000 rev / min and hold at that level for 30 seconds to clean the intake manifold from the fuel vapor, and then leave the engine running at idle. 2. Use the adjustment screw idle speed, adjust the speed of the crankshaft at engine idle (cm. Subsection 5.1.1). 3. Check the level of CO; if it is different from the one (see. Subsection 5.1.1), remove the seal and adjust the amount of the adjustment screw idle mixture to obtain the correct level of CO. Turning the screw clockwise (twisting) reduces the level of CO, the rotation of the screw counter-clockwise (twisting) increases the level of CO. If you do not have CO sensor, the operation of adjusting the amount of idle mixture without the use of CO sensor is described in the relevant chapter. 4. Repeat the above procedure until both adjustment will not be correct. 5. Clean the inlet collector every 30 seconds with an adjustment by increasing the engine speed to 3000 rev / min for 30 seconds. 6. Raise the engine speed up to 2000 rev / min, and measure the level of CO. The resulting value must be less than half the level of CO when the engine is idling. 7. Install a new seal on the adjustment screw amount of the mixture at the end of regulation.

Installing the fuel level in the float chamber / stroke adjustment of the float

Window float chamber

The fuel level in the float chamber can be checked without removing the carburetor. When the engine is running, the fuel level can be checked through the viewing window of the float chamber. If the fuel does not meet the mark, adjustment is necessary.

PERFORMANCE ORDER

1. Remove the carburetor, guided by the instructions resulted in subsection 5.1.3. 2. Turn the cover of the carburettor so that the float looked up, and the needle valve was closed. 3. Measure the distance "H" (height of installation of the float) between the cover and the plastic carburetor float (without pads). Make sure that the mounting height of the float was as described in section 5.1.1. 4. Adjust the height of the float installation, bending the float lever "A". N. Installation height of the float 5. Turn the cover and check the carburetor to float down, as it allows limiting tab. 6. Measure the distance "L" (stroke float) between the lid and the underside of the carburetor float. Compare the value obtained with the value specified in subsection 5.1.1. 7. Adjust the stroke of the float, bending restrictive tab "B".

Adjustable mechanical air flap

Before adjusting the choke, make sure that the engine speed at idle and the number of idle mixture correctly adjusted.

Adjustment of fast idling - the carburetor removed from the engine

1. Choke 2. throttle - the primary chamber 3. Clearance

PERFORMANCE ORDER

1. Adjustment of fast idling is necessary to remove the carburetor from the engine. 2. Turn the carburetor and using the choke lever fully close the choke. 3. The adjusting screw open throttle, forming a small gap. 4. Using a drill shank, measure the gap between the chamber wall and the edge of the carburetor throttle valve (see. Fig. Checking the position of the choke when the engine in the fast idle). Compare the value obtained with the value specified in subsection 5.1.1. 5. Adjust the amount of the gap by bending the connecting rod at point 1.

Automatic choke

Terms of adjusting the automatic choke valve have been specified (see. Subsection 5.1.1).

Adjustment of fast idling - with the engine running

Adjustment of fast idling (model with semi-automatic choke) - removed from the engine carburetor

Adjustment of fast idling

1. The cam system of fast idling 2. Adjusting screw 3. The lever of system of fast idling

Adjustment of fast idling (model with automatic choke) - removed from the engine carburetor

Combining marks on the cam of fast idling and the lever

1. Throttle lever 2. The lever of system of fast idling 3. Adjusting screw

PERFORMANCE ORDER

1. Wait until the temperature drops to the level of the carburetor 25 ?� C and the carburetor soak at this temperature for at least an hour. 2. Make sure that the mark "25 ?�" on the cam of fast idling coincided with the center of the lever of fast idling. 3. Adjust the level by turning the adjusting screw in the desired direction. 4. Turn the carburetor and using shank measure the gap between the chamber wall and the edge of the carburetor throttle valve (see. Fig. Checking the position of the choke when the engine in the fast idle). Compare the value obtained with the value specified in subsection 5.1.1. 5. Adjust backlash size by turning the adjusting screw in the desired direction.

The opening of the choke at full throttle

PERFORMANCE ORDER

1. Fully open the throttle and using shank measure the clearance "R" between the upper edge of the air damper and air intake duct. Compare the value obtained with the value specified in subsection 5.1.1. 2. Adjust the value of the gap (R), bending the tab "A".

Checking the throttle aperture, measuring the gap

D. Adjustment lever - automatic choke R. Clearance

PERFORMANCE ORDER

1. Disconnect the vacuum hose and connect the vacuum pump to each diaphragm opening the choke at a time. Evacuated to obtain a vacuum of 400 mm Hg; iris should be fully open air damper and vacuum must be maintained for at least 30 seconds. Replace the diaphragm, if it is faulty. 2. Maintain the vacuum at 400 mm Hg in order to stem the aperture opening of the choke climbed through. 3. Using a drill shank measure the gap between the upper edge of the air damper and the wall of the air intake duct. Compare the value obtained clearance from the value specified in subsection 5.1.1. 4. Adjust the value of the gap by bending the rod (manual choke) or lever (automatic choke) at the end of the diaphragm rod. 5. On some models, has two apertures opening the choke. Check both the diaphragm. Thermal vacuum valve opening of the second aperture to be opened when the coolant temperature is above 19 ?� 3 ?� C.