Standard

AUT 128 - FUEL, IGNITION, AND EMISSION SYSTEMS

Course Description

Introduces fuel, ignition, and exhaust systems theory, diagnosis, repair, and service for vehicles with carburetion and fuel injection systems. Topics include: general engine diagnosis; ignition system diagnosis and repair; fuel, air induction, and exhaust systems diagnosis and repair; positive crankcase ventilation; exhaust gas recirculation; engine related service.

Competency Areas		Hours
General Engine Diagnosis		Class	5
Ignition System Diagnosis and Repair		D. Lab	0
Fuel, Air Induction, and Exhaust Systems Diagnosis and Repair		P. Lab/O.B.I.	6
Positive Crankcase Ventilation		Credit	7
Exhaust Gas Recirculation
Engine Related Service
Prerequisite:	AUT 122, 124, and 126
Corequisite:

Course Guide

Competency	After completing this section, the student will:	Hours
		Class	D.Lab	P.Lab/ O.B.I.
General Engine Diagnosis		10		5
	Interpret and verify engine concern; determine necessary action. Inspect engine assembly for fuel, oil, coolant, and other leaks; determine necessary action. Diagnose unusual engine noise or vibration concerns; determine necessary action Diagnose unusual exhaust color, odor, and sound; determine necessary action Perform engine absolute (vacuum/boost) manifold pressure test; determine necessary action Perform cylinder balanced test; determine necessary action Perform cylinder compression test; determine necessary action Perform cylinder leakage test; determine necessary action Diagnose engine mechanical, electrical, electronic, fuel, and ignition concerns with an oscilloscope and engine diagnostic equipment; determine necessary action Repair for or five gas analyzers; inspect them prepare vehicles for test, and obtain exhaust readings; interpret readings, and determine necessary action
Ignition System Diagnosis and Repair		10		15
	Diagnose no-starting, drivability, and ignition concerns a vehicle with electronic ignition (EI/DIS) (distributorless) systems; determine necessary action Diagnose no-starting, driveability, and emissions concerns on vehicles with distributor ignition (DI) systems; determine necessary action Inspect and test ignition primary circuit wiring and components; perform necessary action Inspect and test distributor; perform necessary action Inspect and test ignition system secondary circuit wiring and components; perform necessary action Inspect and test ignition coil(s); perform necessary action Check and adjust (where applicable) ignition system timing and timing advance/retard Inspect and test ignition system pick-up sensor or triggering devices; perform necessary action Inspect and test ignition control module; perform necessary action
Fuel, Air Induction, and Exhaust Systems Diagnosis and Repair		10		15
	Diagnose hot or cold no-starting, hard starting, poor driveability, incorrect idle speed, poor idle, flooding, hesitation, surging, engine misfire, power loss, stalling poor mileage, dieseling, and emissions problems on vehicles with carburetor-type fuel systems; determine necessary action Inspect fuel tank and fuel cap, fuel lines, fittings, and hoses; perform necessary action Check fuel for contaminants and quality; determine necessary action Inspect and test mechanical and electrical fuel pumps and pump control systems; perform necessary action Replace fuel filters Inspect and test fuel pressure regulation system and components; perform necessary action Inspect and test cold enrichment system and components; perform necessary action Remove, service, and install throttle body; adjust related linkages Inspect, test, and clean fuel injectors Inspect throttle body mounting plates, air induction and filtration system, intake manifold, and gaskets; perform necessary action Check idle speed and fuel mixture Adjust idle speed and fuel mixture Remove, inspect, and test vacuum and electrical circuits, components and connections of fuel system; perform necessary action Inspect exhaust manifold, exhaust pipes, muffler(s), catalytic converter(s), resonator(s), tail pipe(s), and heat shield(s); perform necessary action Perform exhaust system back-pressure test; determine necessary action Test the operation of turbocharger/supercharger systems; determine necessary action
Positive Crankcase Ventilation		6		7
	Diagnose oil leaks, emissions, and driveability problems resulting from failure of the positive crankcase ventilation (PCV) system; determine necessary action Inspect and test positive crankcase ventilation (PCV) filter/breather cap, valve, tubes, orifices, and hoses; perform necessary action
Exhaust Gas Recirculation		6		8
	Diagnose emissions and driveability problems caused by failure of the exhaust gas recirculation (EGR) system; determine necessary action Inspect and test valve, valve manifold, and exhaust passages of exhaust gas recirculation (EGR) systems; perform necessary action Inspect and test vacuum/pressure controls, filters, and hoses of exhaust gas recirculation (EGR) systems; perform necessary action Inspect and test electrical/electronic sensors, controls, and wiring of exhaust gas recirculation (EGR) systems; perform necessary action
Engine Related Service		8		10
	Adjust valves on engines with mechanical or hydraulic lifters Verify correct camshaft timing; determine necessary action Verify engine operating temperature; determine necessary action Perform cooling system pressure tests; check coolant condition; inspect and test radiator, pressure cap coolant recovery tank, and hoses; perform necessary action Inspect and test thermostat, by-pass, and housing; perform necessary action Inspect and test mechanical/electrical fans, fan clutch, fan shroud/ducting, air dams, and fan control devices; perform necessary action

Suggested Resources

Books

Duffy, J. E. (2000). Modern AutomotiveTechnology. South Holland, IL: Goodheart-Willcox.

Erjavec, J. (2000). Automotive Technology (3^rd ed.). Albany, NY: Delmar.

Erjavec, J. (2000). Automotive Technology Workbook (3^rd ed.). Albany, NY: Delmar.

Gilles, T. (1999). Automotive Service Inspection, Maintenance, and Repair (1^st ed.). Albany, NY: Delmar

Toboldt, W. K., & Johnson, L. (1995). Automotive Encyclopedia. South Holland, IL: Goodheart-Willcox.

Webster, J., & Owen, C. E. (2000). Basic Automotive Service & Systems (2^nd ed.).

Albany, NY: Delmar.