Cadillac Repair: throttle position sensor, throttle position sensor, volt ohm meter

Question
Hi,
1994 Cadillac DeVille 4.9L. Where is the Throttle position sensor? Would this sensor, if bad, cause the engine to idle high to low while in park, or at stop light?  

Answer
Could be either the TPS and or the IDLE SPEED CONTROL MOTOR.

If you are mechanicaly inclined or know of someone who is, You will need a DIGITAL VOLT/OHM METER, Simple electrical schematics, Test procedures and picture locations of the components within the system that is causing you problems of which can't be done on this website which only allows one picture. I do not have a website so you will have to e-mail: onlineautohelp@msn.com in order to obtain the information necessary to fix your vehicle.