Although such "machines" seem to be a popular topic of discussion, they simply do not exist. we have many types of diagnostic equipment and testing devices that assist our technicians in locating a failure. We pride ourselves in being diagnostic specialists and get many referrals from other shops for driveability problems. But, rarely does the test equipment in itself instantly tell our technicians exactly what the problem is. They do assist the technician in narrowing the failure to a particular system or sub-system. It is the trained experienced technician that actually pinpoints the failure.
Some people believe that the more information they tell the shop about their vehicle, the more it will cost them. Fact is the exact opposite is true. Large amounts of customers money is wasted everyday because of charge incurred when technicians spend time searching in the wrong areas when they do not have enough good information to go on. Just like when you go to the doctor, you want to give as much detail as possible to assist in locating the problem quickly and efficiently.