What type of gas should I put in my 1998 Lincoln Town Car Executive Series? 87, 89, or 93?

maybe carbon dioxide emission code

call around to different auto wrecking yards until you find what your looking for.

The Town Car Executive series is the bottom line of the Town Cars.
It has the fittings to put a CD Player in...but most did not have them (unless specially ordered)

The next series up...is the Signature Series and has a 50 / 50 chance of having a CD player.
After that, the Presidential Series (special ordered series had the players)
Then top of the line Lincoln Town Car is the Cartier...with all the bells & whistles...and CD Player.

If ya have one...its in the trunk usually on the drivers side just below the "air ride" switch.

Sounds like low transmission fluid. Check this under the hood, with what is usually a yellow cap.

I have the exact same problem with my town car right now!
Did you ever find a fix?

LEFT SIDE WALL IN TRUNK.

are you looking for the code? It's four didgets. You can usually find the code on one of the arms that hold the trunk up.

if you check in your owners manual in the section under fuses,it will tell you what size and location of fuse box,and what each fuse is for

You have a bad multi-function switch

sounds like very dirty throttle body and /or defective idle air control valve