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Just figured I would update my 1200 rpm problem. I now have 8000 mles on the car and the problem has gradually grown worse. It now excites something in the door panel and now I have door panel vibrations. When new the car did not have this problem. It first occured at about 3000 miles and has progressivly grown worse.
This weekend while driving my wife's Monte SS with a 3800 V6 auto I noticed that the engine rpm never drops below 1500 rpm. For our cars it seems to me, a simple interim fix would be to revise the software to change the tranmission shift points to not let the engine rpms drop below 1500. Apparantly this engine doesn't like to operate smoothly at 1200 rpm.
All I know for sure is that it is becoming so annoying that I am now considering seLling the car, but anyone test driving the car will notice the 1200 rpm buz and ask what it is? and all I can respond is UNKNOWN.
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