You don't, fix the vacuum leak that's causing the eratic idle conditions
The calipers are threaded and screw out.
You have two adjusting screws at the top of the dieselpump. And the outer screw is for idle if i dont remember wrong. but that you will notice when you adjust the screw.
there is a screw on the carb. be sure to adjust while the engine is running so you can tell by the idle when it is set properly.
I would get a philips head screw driver. Then I would locate the screw on the headlight housing. I would then use the screwdriver on the screw as I needed.
There is an adjustment screw on the side of the throttle body that adjusts how open the throttle body sits.
I like to get on a dark road and adjust them with the screws on top and sides of the lights but don't blind the driver comming at you.
yes
There is an adjustment screw that sits against the "dashpot" and you turn it right (in) to lower the idle and left (out) to raise the rpms.
your 2000 buick regal has a timing chain
Amazingkeys.com has the 2000 Buick LeSabre Key. It does have the chip in it.
Instructions for replacing radiator on 2000 Buick Lesabre custom
Unscrew cap near center of firewall. Screw on ac refill can & follow directions on can. Suggest you use refill with a leak sealer additive.