The idle speed is computer controlled
It is not adjustable. If the idle speed is not correct, then you have a sensor/actuator/computer issue.
no.fully unajusteble
The choke mechanism on your 98 Explorer could be sticking. The EGR valve could also not be functioning right. Either of these issues could cause the rough idle problem.
Timing and idle are computer controlled and not adjustable
If your looking at the carbueretor from the left side of the warrior, there is a small idle screw on the bottom-left side of the carbueretor. Turn it clockwise looking up at the screw to turn the idle up, and vice versa.
a 98 Honda civic should not have a carburetor. it is a fuel injected vehical. in this case there might be a screw that you can adjust the idle with. have someone watch the engine as you pump the gas. the engine can be off when you do this. they will show you the arm, of lever that moved. when it sits all the way down (gas pedal off all the way) it will stop on a screw. turning it right = idle up, turn left (counterclockwise) = idle down. but mostlikely everything is all electric and a shop will have to adjust it with a computer.
Computer needs to re-learn the idle. Spark plugs are bad. Valves are not properly gapped. Adjust Idle Speed on Throttle body.
Yes ANSWER No - a 1998 3.0 L Ford Ranger does not have a distributor which would allow you to adjust the ignition timing - it has a coil pack and the ignition timing is controlled by the PCM ( powertrain control module )
possibly the throttle position sensor the sensor will also change the shifting pattern
No
If you have a carburetor on a 98 subaru, I'd like to see it.
that automatic dont need adjust that automatic dont need adjust