One problem with the dyno test is when they forget to put a fan in front of the car before the test.You sit in line for forty minutes,ten minutes to check the vin,plates,converter,fuel hole size and gas cap test.By the time you do all of this the car is red hot then they put it on the dyno and do stop and start testing.If you do this on a 90 degree day you better hope all is well under the hood.In IL you only get three chances to pass then they suspend your plates.They have a law that they want to try to pass that if the car fails you can never get plates again.