Pontiac Repair: 91 Gran Prix rich runner, tps sensors, gran prix

Question
I have just bought a 91 Gran Prix with a 3.1L non-turbo and i am working out the bugs.I had a problem with getting a 5 volt reference to my MAP and TPS sensors and have since fixed it by finding a short.Now I have another problem.The Snap-On scanner is reading rich exhaust oxygen most of the time.Every now and then it will blink over to lean but stays rich for the most part.I am not sure where to start to solve this problem.I also need to know how to replace the window guides for the power windows.

Answer
1st of all you could try a different scanner. Snap on scanners do not always read correctly and can cause false problems. If it is really running to rich it will set a code 45. You might want to check your injector resistance.
The window guides should just snap on to the glass.