Not only that... his car is a 2001 too... Costco wheel balancer are rarely ever calibrated. I still think it is wheel balance issue. You don't need roadforce balancer... but a good balancer.

My uncle got a new machine and everytime I go there, I manually calibrate his machine before I do any balancing. He and his crew never calibrate the machine. Before this machine he had a good Coat wheel balancer but something was seriously wrong with it. We could never calibrate the machine... I would run like 5 or 6 calibration and the result are horrible. The machine would read zero but if I keep spinning it to check it, it would throw new weight readings... never ending.