Help friggen thing stalls, boggs and sputters

Ok so Im still not a proud owner of a 1990 GM. I have run a code reader and come up with a Code 23 "throttle position sensor out of range" and a code 63 " Throttle position circuit fault below min voltage" How do I fix this problem? This car hesitates, stalls and boggs down and needs to be corrected ASAP. Thanks for the helf in advanced.

It sounds like a bad throttle position sensor. They sell new ones. Make sure you install it in the same position. Cover the clean marks completely.
Why are posting on a Mercury posting. To check out you need a service manual.

Im posting on a mercury forum because I drive a mercury Grand Marquis ( GM abreviated ) We are going to change out the sensor tomorrow.