I have a 2000 Nissan Maxima and it runs and drives great except for in the morning. The car has one code and it is the p0430, catalyst efficiency bank 2. In the morning the idle is really high and it runs good, but when you put it in drive it will die out sometimes, but it will start right back up. Also, until it warms up it has a wierd sound coming from somewhere on the right side or underneath the car, it sounds like a faint rattiling sound, almost like a bad cat or something??? Also, it just sounds real dry and it sounds like a pulley is grinding at times. These could be numerous problems or just one, but when it warms up it runs really good and it is really quiet and smooth. ALSO, when sitting at a light with it idling even when it is warm, there is like a bubbley sound coming from the right side of the car and you can here it inside, but you can not here it when you get it out, and if ou mce the wheel around it will stop. When you get out of the car you can kind of here it on the right side but you can feel it in the body, it is like puttering, but if you push down on the fender or anything on that side of the car for that matter it stops. Suspension seems fine. Now that was just the engine, when I make a slow sharp turn when pulling out somewhere it sometimes makes a really loud clunk sound once and thats it. It sounds like a piece of metal breaking loose. This car is spooky, please help!!!!!