The Haynes CJ manual is excellent! The carb and wiring stuff it right on.
That said, if you have the 83 with no O2 sensor, the computer has gone into limp home mode and has clamped down on the timing and carb mix.
You should disable the computer and set it up manually. It will give you at least 10 mph more in each gear easily and your gas mileage will go up. I can walk you through a basic carb mix if needed to dump the computer.
Here is a decent link on the computer dump:
The outside one that hits the round center rod is the curb idle.
The next one in that hits on that plastic step set that turns when the choke closes is the fast idle. When fully warmed up, you set that stepper up to the second from top step and turn the screw until you have
1750 rpm.There is maybe one more screw up top of this and it hits on a solenoid thing. Forget about it if the computer isn't functioning, in limp mode or with no computer it doesn't work. It is there to step up the idle for an auto in gear or AC when it kicks on.
If the idle tubes on the carb are plugged which is common on older ones, then the curb idle screw might not be able to bring up the speed. If so post, that is a different issue as is the carb mix screws.
Mike
86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT'ssnipped-for-privacy@columbus.rr.com wrote: