I am wondering why I have an oscillation in throttle when I am going down the road at about 40 to 55 mph. I try my best to ignore it, but it can annoy me at times. the variation isn't much (25 50 rpms) but I feel it when I drive.

Another matter I have is I am wondering if I should bypass the throttle body heater for cooler intake temp. I have also rigged a relay on the system to where the cooling fan will come on when I turn the key on. I did this to another Cadillac I had because I had a bad experience with it overheating and eventually had to replace the engine. I wonder if I should put it back.