Usually not much if any. If the idle is high it usually indicates a vacuum leak or possibly the throttle plate is sticking, binding, worn throttle shaft. The idle air control valve controls your idle air as well and it may be dirty, sticking or defective. I would check for any cracks in the vac hoses as well which would cause an unmetered air leak.
Driver side of the throtle body.Driver side of the throtle body.
no they dont they have a throtle body injection(TBI) no they dont they have a throtle body injection(TBI)
need to clean up the throtle body first.
Probably idle control sosonoid located on the throtle body. Take it off and clean it and where it mounts. Also cleqan the inside of the throtle body where the throtle plate is as a carrbon ring forms there.
It is in the ducting before the throtle body.
front of throtle body
Hey Howard==It probably is the idle speed solonoid. Take if off of the throtle body and clean it with carb cleaner. Also clean the inside of the throtle body where the throtle plate is as a carbon ring forms around there. GoodluckJoe
It is controlled by the computer and is not adjustable. If it is so slow that the engine wom't idle the idle control solonoid needs cleaning. It is attached tothe throtle body and clean it and where it mounts with carb cleaner. Also clean the inside of the throtle body where the throtle plate is as a carbon ring forms there.
In the ducting before the throtle body,
to adjust idle on 2000 impala....Locate the accelerator cable on the throttle body.Have someone push down on the accelerator pedel while you observe the throtle body cable movements.You will notice a stop screw on the throtle body butterfly where it comes to rest against the throtle body.Turn the screw clockwise for more rpm, turn the screw counter clockwise for less rpm. I am not sure if any of the air filter componets need to be removed or not... Should't have to do this.Observe...you can do it...
On the drivers side of the throttle body.
In the intakee behind the throtle body.