Chances are the engine is missing. When the trans shifts to 3rd, the RPM's drop and there is more of a load on the engine.
What I need you to do is take the car to a nationally recognized parts store and have them scan the computer for codes. It will help me identify where the problem is coming from. Also, most stores won't charge you for the scan.
Let me know what you find.
Sunday, November 1st, 2009 AT 11:30 AM