2002 Mercury Cougar fuel delivery module

The rpm's stay way to high And takes a good while for it to drop. Act's like the throttle is stuck but I know this is not the problem. I'm going to change the fuel delivery module witch I can not find. Also the fuel gauge does not read correct all the time. The car I'm working on is a 2002 ford mercury cougar. This module is not in the tank. So I'm told. Can anyone help. Thank U