We had a very clean ZL1 that was just purchased a few days ago by a customer that contacted us wanting it checked over as it just didn't feel right to him. We did a base pull for him to see where the car was, and to see if we could experience what the customer was feeling. Needless to say it was very rich and had a lot of other issues in the tune. We swapped plugs and properly tuned the vehicle for our customer. Needless to say Huge gains were made in just a few hours.
