LEGOPARTY

Incompetence is a major problem in a lot of these shops. Since practically all of their customers are there because of low-priced ads, the shops can’t take in enough money honestly, that is to hire top-notch technicians. So most of their mechanics are low-paid, poorly trained, fairly inexperienced workers known as “parts changers.” They may not be any good at diagnosing problems, but they are often real good at changing and selling parts.
Among automotive professionals, a real tune-up expert is known as a “drive ability technician.” This isn’t someone who just knows how to screw in spark plugs; it’s a person who can properly diagnose and repair all types of carburetor problems, electronic ignition, fuel injection, computerized engine controls, and emissions systems.