Hi, I'm new to the boards. I have a few questions to ask regrading some things going on with my 96 Maxima. First, the thermostat stays pretty close to "C" and slowly rises when I idle, but when I drive at Highway speeds, it slowly goes down. Not sure what is going on. Second, when I'm doing normal driving and release the gas pedal the car shakes back and forth a little bit giving a "stall" type feeling. If you guys could tell me whats up I'd appreciate it very much. Thanks

P.S It's Auto.