childers — Why don't you ask your dealer to let you take a test drive in a new car from the lot? Make sure you warm it up completely, and then drive a route back to the dealer. Then do exactly the same with yours. Have the salesman, or technician, or service manager (preferably one of the latter two) along with you for the ride in both cars. After this, both of you should know whether you have a real issue or not.

Stan