This student guide is for Unit 5, Fuel and Carburetion Systems, in the Engine Tune-Up Service portion of the Automotive Mechanics Curriculum. It deals with inspecting and servicing the fuel and carburetion systems. A companion review exercise book and posttests are available separately as CE 031 218-219. An introduction tells how this unit fits into the total tune-up service, defines new terms, and provides work activities on the introductory information. Ten performance objectives are covered: service carburetor air cleaner; service fuel filter; measure fuel flow and pressure; remove, repair, and install fuel lines; remove or replace fuel pump; adjust carburetor idle mixture and idle speed; clean and adjust automatic choke unit; remove and install carburetor; clean and overhaul carburetor; and inspect and repair or replace manifold heat control valve. Each objective is addressed in a separate section that includes these materials: introduction to the performance objective, performance checklist, list of tools and equipment needed to do the work activities for this performance objective, reading list, information sheets, and work activities that give hands-on practice in doing one part of the performance objective. (YLB)