626 L4-2000 1970cc (1982)
Air/Fuel Mixture: Adjustments
Air/Fuel Mixture
Note: All accessories should be off.
Usually adjustment of engine idle mixture is unnecessary.
In case overhaul is necessary due to carburetor trouble, make adjustment of engine idle mixture paying attention to the following points.
1.
Remove the throttle chamber of the carburetor and replace the mixture adjust screw, mixture adjust spring and shell.
2.
After assembling, install the carburetor in the reverse order of removing.
3.
Warm up the engine to normal operating temperature.
4.
Connect an exhaust gas analyzer to the to the vehicle.
5.
Disconnect the air hoses between air control valve and No. 1 & 2 check valves and plug the ports of check valves.
6.
Adjust the idle speed to following specifications by using throttle adjust screw.
Idle speed 670 rpm in neutral (With manual transmission) 850 rpm in "N" range (With automatic transmission)
7.
Turn the mixture adjust screw to set the idle rpm at the highest.
8.
Re-adjust the idle speed to following specifications by using throttle adjust screw.
Idle speed 670 rpm in neutral (with manual transmission) 850 rpm in "N" range (With automatic transmission)
9.
Turn the mixture adjust screw clockwise until the following specifications.
650 rpm in neutral (with manual transmission)
820 rpm in "N" range (with automatic transmission)
10. Check CO concentration. If it is less than 1%, turn the mixture adjust screw counter-clockise 1/4 turn.
11. Reconnect the air hoses and check the idle speed to be at following specifications. If not, set the idle speed to 650 rpm by using throttle adjust
screw.
650 rpm in neutral (with manual transmission)
650 rpm "D" range (with automatic transmission)
12. Fit a blind plug to the mixture adjust screw.
