2013 NATEF Task Area A-8 Engine Performance 7-2013 A. General Engine Diagnosis & Testing B. Computerized Engine Controls C. Ignition System Diagnosis &

2013 NATEF Task Area A-8 Engine Performance7-2013

• A. General Engine Diagnosis & Testing

• B. Computerized Engine Controls

• C. Ignition System Diagnosis & Repair

• D. Fuel, air Induction & Exhaust Systems

• E. Emission Control Systems

• F. Related Engine Service

NATEF Task Area A-8 Engine PerformanceA. General Engine Diagnosis & Testing

Complete work order to include customer information, vehicle identifying information, verify customer concern, related service history, cause, & correction.

“Oldie”


Identify & interpret engine performance concern; determine necessary action.A8.A.1

Engine Testing Results Specifications Notes

Customer Complaint:

Oil Pressure:

Compression Test:

Cylinder Leakage Test:

Oscilloscope Test:

Exhaust Emission Test:

Scan Test:

Visual Inspection:

P-1


Research applicable vehicle and service information, such as engine management system operation, vehicle service history, service precautions, and technical service bulletins.

A8.A.2

P-1


Locate and interpret vehicle and major component identification numbers (VIN, vehicle certification labels, calibration decals).

“Oldie”

NATEF Task Area A-8 engine PerformanceA. General Engine Diagnosis & Testing

Inspect engine assembly for fuel, oil, coolant, and other leaks; determine necessary action.

“Oldie”


Diagnose abnormal engine noise or vibration concerns; determine necessary action.

A8.A.3

P-3


Diagnose the cause of excessive oil consumption, coolant consumption, unusual exhaust color, odor, and sound; determine necessary action.

A8.A.4

P-2


Perform engine absolute (vacuum/boost) manifold pressure tests; determine necessary action.

A8.A.5

P-1


Perform cylinder power balance test; determine necessary action.A8.A.6

http://automotiverepairsoftware.org/automotive-cylinder-power-balance-test.html

P-2




Perform cylinder cranking and running compression tests; determine necessary action.

A8.A.7

P-1


Perform engine running compression test; determine necessary action.“Oldie”


Perform cylinder leakage test; determine necessary action.A8.A.8

P-1


Diagnose engine mechanical, electrical, electronic, fuel, and ignition concerns; determine necessary action.

A8.A.9

P-2


Prepare 4 or 5 gas analyzer; inspect and prepare vehicle for test, obtain exhaust readings, interpret readings and determine necessary action.

“Oldie”


Verify engine operating temperature; determine necessary action.A8.A.10

P-1


Perform cooling system pressure tests; check coolant condition; inspect and test radiator, pressure cap, coolant recovery tank, and hoses; perform necessary action.

“Oldie”


Verify correct camshaft timing.A8.A.11

P-1

NATEF Task Area A-8 Engine PerformanceB. Computerized Engine Controls Diagnosis & Repair

Retrieve and record diagnostic trouble codes, OBD monitor status, and freeze frame data; clear codes when applicable.

A8.B.1

P-1


Access and use service information to perform step-by-step (troubleshooting) diagnosis.

A8.B.2

P-1


Perform active tests of actuators using a scan tool; determine necessary action.A8.B.3

P-2


Describe the importance of running all OBDII monitors for repair verification.A8.B.4

P-1


Diagnose the causes of emissions or driveability concerns with stored or active diagnostic trouble codes; obtain, graph, and interpret scan tool data.

A8.B.5

P-1


Diagnose emissions or driveability concerns without stored diagnostic trouble codes; determine necessary action.

A8.B.6

P-1


Check for module communication (including CAN/BUS systems) errors usng a scan tool.

“Oldie”


Inspect and test computerized engine control system sensors, power train/engine control module (PCM/ECM), actuators, and circuits using a graphing multi-meter (GMM)/digital storage oscilloscope (DSO); perform necessary action.

A8.B.7

P-2

http://www.picoauto.com/automotive-library.html

http://www.picoauto.com/automotive-library.html


Obtain and interpret scan tool data.“Oldie”


Diagnose driveability 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.

A8.B.8

P-3

NATEF Task Area A-8 Engine PerformanceC. Ignition System Diagnosis & Repair

Diagnose (troubleshoot) ignition system related problems such as no-starting, hard starting, engine misfire, poor driveability, spark knock, power loss, poor mileage, and emissions concerns; determine necessary action.

A8.C.1

P-2


Inspect and test crankshaft and camshaft position sensor(s); perform necessary action.

A8.C.2

P-1


Diagnose ignition system related problems such as no-starting, hard starting, engine misfire, poor driveability, spark knock, power loss, poor mileage, and emissions concerns on vehicles with distributor ignition (DI) systems; determine necessary action. no-start, driveability, & emission concerns on vehicles w/ electronic ignition-determine action.

“Oldie”


Inspect, test, and/or replace ignition control module, powertrain/engine control module; reprogram as necessary.

A8.C.3

P-3


Inspect and test ignition primary circuit wiring and solid state components; perform necessary action.

“Oldie”


Inspect, test, and service distributor.“Oldie”


Remove and replace spark plugs; inspect secondary ignition components for wear and damage.

A8.C.4

P-1


Inspect and test ignition system secondary circuit wiring and components; perform necessary action.

“Oldie”


Inspect and test ignition coil (s); perform necessary action.“Oldie”


Check and adjust ignition system timing and timing advance/retard (where applicable).

“Oldie”


Inspect and test ignition system pick-up sensor or triggering devices; perform necessary action.

“Oldie”

NATEF Task Area A-8 Engine PerformanceD. Fuel, Air Induction Exhaust System Diagnosis & Testing

Diagnose (troubleshoot) 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; determine necessary action.

A8.D.1

P-2


Check fuel for contaminants; determine necessary action.A8.D.2

P-2


Inspect and test fuel pumps and pump control systems for pressure, regulation, and volume; perform necessary action.

A8.D.3

P-1


Remove & replace fuel filter(s).A8.D.4

P-1


Inspect, service, or replace air filters, filter housings, and intake duct work.A8.D.5

P-1


Inspect and test cold enrichment system and components; perform necessary action.

“Oldie”


Inspect throttle body, air induction system, intake manifold and gaskets for vacuum leaks and/or unmetered air.

A8.D.6

P-2


Inspect and test fuel injectors.A8.D.7

P-2


Verify idle control operation.A8.D.8

P-1


Inspect integrity of the exhaust manifold, exhaust pipes, muffler(s), catalytic converter(s), resonator(s), tail pipe(s), and heat shields; perform necessary action.

A8.D.9

P-1


Inspect condition of exhaust system hangers, brackets, clamps, and heat shields; repair or replace as needed.

A8.D.10

P-1


Perform exhaust system back-pressure test; determine necessary action.A8.D.11

P-2


Check and refill diesel exhaust fluid (DEF).A8.D.12

P-3


Test the operation of turbocharger/supercharger systems; determine necessary action.

A8.D.13

P-3

NATEF Task Area A-8 Engine PerformanceE. Emission Control Systems Diagnosis & Repair

Diagnose oil leaks, emissions, and driveability concerns caused by the positive crankcase ventilation (PCV) system; determine necessary action.

A8.E.1

P-3


Inspect, test, and service positive crankcase ventilation (PCV) filter/breather cap, valve, tubes, orifices, and hoses; perform necessary action.

A8.E.2

P-2


Diagnose emissions and driveability concerns caused by the exhaust gas recirculation (EGR) system; determine necessary action.

A8.E.3

P-3


Diagnose emissions and driveability concerns caused by the secondary air injection and catalytic converter systems; determine necessary action.

A8.E.4

P-2


Diagnose emissions and driveability concerns caused by the evaporative emissions control system; determine necessary action.

A8.E.5

P-2


Inspect and test electrical/electronic sensors, controls, and wiring of exhaust gas recirculation (EGR) systems; perform necessary action.

A8.E.6

P-2


Inspect, test, service, and replace components of the EGR system including tubing, exhaust passages, vacuum/pressure controls, filters, and hoses; perform necessary action.

A8.E.7

P-2


Inspect and test mechanical components of secondary air injection systems; perform necessary action.

“Oldie”


Inspect and test electrical/electronically-operated components and circuits of air injection systems; perform necessary action.

A8.E.8

P-3


Inspect and test catalytic converter efficiency.A8.E.9

P-2


Inspect and test components and hoses of the evaporative emissions control system; perform necessary action.

A8.E.10

P-1


Interpret diagnostic trouble codes (DTCs) and scan tool data related to the emissions control systems; determine necessary action.

A8.E.11

P-3

NATEF Task Area A-8 Engine PerformanceF. Related Engine Service

Adjust valves on engines with mechanical or hydraulic lifters.“Oldie”


Remove and replace timing belt; verify correct camshaft timing.“Oldie”


Remove and replace thermostat and gasket.“Oldie”


Inspect and test mechanical/electrical fans, fan clutch, fan shroud/ducting, air dams, and fan control devices; perform necessary action.

“Oldie”


Perform common fastener and thread repairs to include: remove broken bolt, restore internal and external threads, and repair internal threads with thread insert.

“Oldie”


Perform oil and filter change.“Oldie”


Demonstrate proficiency in using oxy-acetylene torch to heat and cut metal.“Oldie”


Identify hybrid vehicle internal combustion engine service precautions.“Oldie”

Documents

2013 NATEF Task Area A-8 Engine Performance 7-2013 A. General Engine Diagnosis & Testing B. Computerized Engine Controls C. Ignition System Diagnosis &