Im trying to figure out why my Z is starting at higher RPMs , i dont remember it ever doing that. It only has 30k miles on it and it will start higher and as it idles will decrease back to lower rpm of 1k , my auto start wont work with it anymore and it will often take a few tries from the auto start to crank the engine up. Any ideas?

 

Auto start eh. I'd begin checking the sensors. Any check engine lights?

 

There are no check engine lights , nothing wrong in that area , the auto start will work after ive driven the car for about 5 min. At that point i can turn the car off and the auto start will work. But if the car sits too long i get that same problem again. Is this a serious problem? Someone recommended it was a fuel pump / filter issue , coudl that be the case?