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Engine Tune-Up Chapter 47. Engine Tune-Up A modern tune-up is performed as a part of routine maintenance instead of a drive-ability problem. People used.

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Presentation on theme: "Engine Tune-Up Chapter 47. Engine Tune-Up A modern tune-up is performed as a part of routine maintenance instead of a drive-ability problem. People used."— Presentation transcript:

1 Engine Tune-Up Chapter 47

2 Engine Tune-Up A modern tune-up is performed as a part of routine maintenance instead of a drive-ability problem. People used to wait until the vehicle ran poorly to do a tune up  When modern vehicles run poorly, it’s usually a sensor or computer related problem and seldom will a tune-up repair the it!

3 Spark Plugs Engine Tune-Up - Spark Plugs Some vehicle do not schedule a spark plug replacement until 100,000 miles! Some vehicle do not schedule a spark plug replacement until 100,000 miles!

4 Engine Tune-Up Service and replacement items in a minor tune up include: 1 2 3 4 5 6 Minor Tune Engine Tune-Up - Minor Tune

5 Major Tune Engine Tune-Up - Major Tune Service and replacement items in a major tune up include: 1 2 3 4 5 6

6 Diagnostic tools Engine Tune-Up - Diagnostic tools Diagnostic tools used during a major tune up include: 1 2 3 4 5 6

7 Performance factors Engine Tune-Up - Performance factors Performance factors affected by a tune up include: 1 2 3 4 5 6

8 Rough Idle Engine Tune-Up - Rough Idle Technician at the right says a tune-up will not correct a rough idle in most cases. When modern vehicles run poorly, it’s usually a sensor or computer related problem and seldom will a tune-up repair the it! Technician at the left says the rough idle is most likely due to a defective or malfunctioning sensor, actuator, or ECM. Both Techs are ASE Certified Master Technicians

9 Information Engine Tune-Up - Information It important to gather engine and vehicle performance information before performing the tune-up

10 Temperature Engine Tune-Up - Temperature It important to bring the engine up to full operating temperature prior to diagnosing an operating condition

11 Service Records Engine Tune-Up - Service Records It is important to maintain a vehicle’s service records

12 Safety Rules Engine Tune-Up - Safety Rules OBD II automobiles require the battery be disconnected when performing vehicle service and maintenance.

13 Four (4) safety rules to follow when performing a tune-up: 1 2 3 4 Safety Rules Engine Tune-Up - Safety Rules

14 Procedures Engine Tune-Up - Procedures Vehicle inspections performed during any tune-up:

15 Procedures Engine Tune-Up - Procedures Steps in replacing spark plug wires: 1 2 3

16 Procedures Engine Tune-Up - Procedures When replacing spark plugs in an aluminum engine the engine should be warm

17 Procedures Engine Tune-Up - Procedures Tools used to remove and replace spark plugs:

18 Procedures Engine Tune-Up - Procedures Color observed on a spark plug removed from an efficiently operating engine

19 Procedures Engine Tune-Up - Procedures Steps that must be performed before installing a spark plug in an engine

20 Spark plugs must be installed first, ______ ______ before ??????????? Procedures Engine Tune-Up - Procedures

21 When installing spark plugs equipped with metal sealing washers the spark plug should be threaded in until it bottoms, then tightened an additional _____ turn. Procedures Engine Tune-Up - Procedures

22 Spark plug wires that are not put on the correct cylinder’s spark plug cause the engine to misfire, run poorly, or not run at all (backfires when trying to start). Procedures Engine Tune-Up - Procedures

23 The suggested replacement interval for one- and two-wire O2 sensors, For three wire sensors Procedures Engine Tune-Up - Procedures

24 The recommended procedure for replacing an O2 sensor Procedures Engine Tune-Up - Procedures

25 A compression test is performed during an engine’s life to check the engine’s mechanical condition without disassembly. Procedures Engine Tune-Up - Procedures

26 Three (3) primary adjustments performed during a tune-up: Procedures Engine Tune-Up - Procedures

27 Diesel engines require periodic maintenance similar to gasoline engines, but don’t have spark plugs to replace or an oxygen sensor to fail. Diesel Tune-Up Engine Tune-Up - Diesel Tune-Up

28 The typical service tasks performed during diesel engine maintenance intervals include: Diesel Tune-Up Engine Tune-Up - Diesel Tune-Up

29 Describe/Define a maintenance interval: Diesel Tune-Up Engine Tune-Up - Diesel Tune-Up

30 Engine Tune-Up Questions? Questions? Refer to the Tune-up chapter (47) in your textbook. Refer to the Tune-up chapter (47) in your textbook. Make sure your name, date, and period are on your assignment before you turn it in. Make sure your name, date, and period are on your assignment before you turn it in.


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