AST 203 - Engine Performance II
Credit Hours: 4
Billable Contact Hours: 7
Prerequisites: AST 202
Session Cycle: WI
This course is a continuation of Automotive Engine Performance I. It will reinforce the diagnostics and operational procedures introduced in the previous course, while expanding the student’s understanding of the On Board Diagnostic System. (OBD II). Automotive emission and ignition system operation, design and diagnosis will be covered.
Notes: Applied Science and Engineering Technology Division
Theory Hours: 15
Lab Hours: 90
Learning Outcomes:
1. Understand and demonstrate emissions control systems operation, diagnosis and repair.
a) Diagnose oil leaks, emissions, and drivability concerns caused by the positive crankcase ventilation (PCV) system; determine necessary action.
b) Inspect, test, and service positive crankcase ventilation (PCV) filter/breather cap, valve, tubes, orifices, and hoses; perform necessary action.
c) Diagnose emissions and drivability concerns caused by the exhaust gas recirculation (EGR) system; determine necessary action.
d) Diagnose emissions and drivability concerns caused by the secondary air injection and catalytic converter systems; determine necessary action.
e) Diagnose emissions and drivability concerns caused by the evaporative emissions control system; determine necessary action.
f) Inspect and test electrical/electronic sensors, controls, and wiring of exhaust gas recirculation (EGR) systems; perform necessary action.
g) Inspect, test, service, and replace components of the EGR system including tubing, exhaust passages, vacuum/pressure controls, filters, and hoses; perform necessary action.
h) Inspect and test electrical/electronically-operated components and circuits of air injection systems; perform necessary action.
i) Inspect and test catalytic converter efficiency.
j) Inspect and test components and hoses of the evaporative emissions control system; perform necessary action.
k) Inspect condition of exhaust system hangers, brackets, clamps, and heat shields; repair or replace as needed.
I) Perform exhaust system back-pressure test; determine necessary action.
Applies to Automotive Service Technology, A.A.S. Outcomes A, B, C, D, E, and F.
2. Understand and demonstrate diagnostic procedures and industry standards as they relate to servicing engine performance complaints.
a) Interpret diagnostic trouble codes (DTCs) and scan tool data related to the emissions control systems; determine necessary action.
b) Diagnose drivability and emissions problems resulting from malfunctions of interrelated systems (cruise control, security alarms, suspension controls, traction controls, A/C, automatic transmissions, non-OEM installed accessories, or similar systems); determine necessary action.
c) Inspect integrity of the exhaust manifold, exhaust pipes, muffler(s), catalytic converter(s), resonator(s), tail pipe(s), and heat shields; perform necessary action.
d) Test the operation of turbocharger/supercharger systems; determine necessary action.
Applies to Automotive Service Technology, A.A.S. Outcomes A, B, C, D, E, and F.
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