when my car is in park it will fluctuaute from 2500 rpms to 1500 rpms..it sounds like youre mashing the gas when you are not. we have already replaced the massive air flow sensor and still no luck. when the car is in gear it is fine. however, i dont wont to tear it up worse and, need a quote to fix it. right before it started it idled at 1300 for aboout a week after we had topped off the transmission fluid and changed the oil if that matters.