I didn't want to speak too soon on this, so have used the past few days as a "test run". It does appear now that this chapter of the "Saturn Saga" can be closed. Replacing the TPS in spite of no codes showing at all has brought the idle to where it should be. And, I can drive down the streets without having to use the brakes to slow down due to the fast RPM which plagued before. Installing a new Idle control, cleaning the throttle plate, and a new oxygen sensor (for which a code did appear a week or so ago) may delay other events later, but do not appear to be the real solution for the idle.
Also have noticed that I can remove the key from the ignition easily each time instead of at times having to restart the engine to get a "normal" idle before the key will release. Looks as though there could have been a series of issues, some obvious and some not so much, that may be normalized due to the computer seeing normal signals! Thanks for your patient advice on this one!
Monday, May 25th, 2015 AT 9:33 AM