Cadillac Repair: 81 elderado, elderado, throttle switch

Question
Car starts but well only run for about 30 sec then dies getting codes 27 & 30 replaced the tps & ips didnt work need help

Answer
Did you CLEAR (erase these 2 codes and then started the car and did they come back ?.

Your problem is with the

27 = Open throttle switch.

30. Idle Speed Control (ISC) circuit problem.

WHY did you replace the TPS ?.

You will need 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.