From problem replication through repair confirmation, this new book, TechOne: Automotive Engine Performance, presents a complete diagnostic process that equips readers with the skills and knowledge to troubleshoot problems encountered by today's automotive technicians. All-inclusive coverage explores each of the major systems controlled by the computer engine management system such as ignition fuel and emissions. Practical diagnostic methods are highlighted, giving users guidance as to when a test should be performed and what the expected results should be. Working through these procedures affords readers a strong foundation in engine performance that prepares them for more advanced courses of study.