Engine Tune – V6 Engine Page 6F1–1

Page 6F1–1

Section 6F1

Engine Tune – V6 Engine

ATTENTION

Before performing any service operation or other procedure described in this Section, refer to Section 00

Warnings, Cautions and Notes for correct workshop practices with regard to safety and/or property damage.

1 General Information............................................................................................................................... 2

1.1 Vehicle Emission Control Information .................................................................................................................2

2 Engine Tune Recommendations.......................................................................................................... 3

2.1 Engine Tune Recommendation Chart ..................................................................................................................3

3 Engine Tuning Data............................................................................................................................... 4

3.1 Engine Tuning Data Chart .....................................................................................................................................4

3.2 Tuning Service Notes.............................................................................................................................................5

3.3 Cylinder Balance Check ........................................................................................................................................6

Engine Tune – V6 Engine Page 6F1–2

Page 6F1–2

1 General Information

With the following exceptions, MY 2004 VY and V2 Series V6 Engine Tune information carry over from MY 2003 VY and

V2 Series vehicles:

• vehicle emission control information label,

• engine tune recommendation chart, and

• engine tuning data chart.

For V6 engine tune information not provided in this Section, refer to Section 6F1 Engine Tune – V6 Engine in the

MY 2003 VY and V2 Series Service Information.

1.1 Vehicle Emission Control Information

Engine tune specifications necessary to achieve the correct

emission levels are located on the vehicle emission control

information label (1), located in the engine compartment on

the grain free area of the radiator shroud. Refer to the label

before adjusting the engine.

To maintain the performance and emission control levels

specified for the vehicle, it is necessary for regular

maintenance to be performed in accordance with the

schedule set out in the VY Series Owner's Handbook.

Figure 6F1 – 1

For domestic vehicles produced before 2004 and vehicles for export to Brazil and Indonesia, the vehicle emission control

information label carries over from MY 2003 VY and V2 Series vehicles. Refer to Section 6E1 Emission Control – V6

Engine in the MY 2003 VY and V2 Series Service Information.

For domestic vehicles produced from the start of 2004 and vehicles for export to the Gulf States and Thailand, a new

vehicle emission control information label is introduced, refer to Figure 6F1 – 2.

Figure 6F1 – 2

Engine Tune – V6 Engine Page 6F1–3

Page 6F1–3

2 Engine Tune Recommendations

2.1 Engine Tune Recommendation Chart

The following engine tune recommendation chart lists the items that require attention when tuning the engine. Cross-

references to the appropriate section in the MY 2004 VY and V2 Series Service Information are also provided.

There is no provision for ignition timing, idle speed and idle mixture adjustments on MY 2004 VY and V2 Series models

with a V6 engine, refer to Section 6C1 Powertrain Management – V6 Engine in the MY 2004 VY and V2 Series Service

Information.

NOTE

The use of unleaded petrol will result in black tail

pipe deposits rather than the familiar grey colour.

Therefore, the black colour does not indicate a

poor state of engine tune.

Engine Tune Recommendations Service Information

Reference Section

Engine Compression Test. Section 6A1 Engine Mechanical – V6 Engine.

Also refer to 3.2 Tuning Service Notes in this

Section.

Engine Drive Belt Check. Section 6A1 Engine Mechanical – V6 Engine.

Cooling System Check for Leaks. Section 6B1 Engine Cooling – V6 Engine.

Valve Lash Adjustment Non-Adjustable (Hydraulic

Lifters).

Idle Speed Non-Adjustable.

Idle Mixture Non-Adjustable.

Air Cleaner Check or Replace, Test for

Leaks. Section 6C1 Powertrain Management – V6

Engine.

Fuel Filter Check and Replace. Section 6C1 Powertrain Management – V6

Engine.

Spark Plugs Clean, Adjust or Replace. Section 6C1 Powertrain Management – V6

Engine.

Spark Plug Leads Test for Continuity. Section 6C1 Powertrain Management – V6

Engine.

Ignition Timing Non-Adjustable.

Exhaust System Check for Excessive Back

Pressure, General Condition

and Oxygen Sensor Operation.

Section 8B Exhaust System.

Section 6C1 Powertrain Management – V6

Engine.

Engine Ventilation Check. Section 6E1 Emission Control – V6 Engine.

Evaporative Emission

Control Check Lines, Hoses and

Canister. Section 6E1 Emission Control – V6 Engine.

Battery and Cables Check. Section 12A Battery and Cables.

Engine Tune – V6 Engine Page 6F1–4

Page 6F1–4

3 Engine Tuning D ata

3.1 Engine Tuning Data Chart

For domestic vehicles produced before 2004 and vehicles for export to Brazil and Indonesia, the engine tuning data chart

carries over from MY 2003 VY and V2 Series vehicles. Refer to Section 6F1 Engine Tune – V6 Engine in the MY 2003

VY and V2 Series Service Information.

The following table provides condensed engine tuning data and is applicable to domestic vehicles produced from the

start of 2004 and vehicles for export to the Gulf States and Thailand.

SPARK PLUGS

ENGINE TYPE TRANSMISSION IDLE SPEED

(RPM) IGNITION

TIMING TYPE GAP (mm)

Manual 775 ± 50

725 ± 50

(In Neutral)

3.8 Litre P.F.I.

V6 Normally

Aspirated Automatic

Transmission 650 ± 50

(In Drive)

PCM Controlled

(Non –

Adjustable)

NGIL

BPR6EFS-15

Denso

T20EPRU-15

1.5 mm

+0.0 / -0.1mm

NOTE

Idle speed is controlled by the PCM and varies

with:

• Battery voltage

• Engine temperature

• Air conditioning usage

• Park/Neutral Switch Signal (Auto. only)

Engine Tune – V6 Engine Page 6F1–5

Page 6F1–5

3.2 Tuning Service Notes

The tuning service notes carry over from MY 2003 VY and V2 Series vehicles. Refer to Section 6F1 Engine Tune – V6

Engine in the MY 2003 VY and V2 Series Service Information.

For compression testing procedure and specifications, refer to Section 6A1 Engine Mechanical – V6 Engine.

Engine Tune – V6 Engine Page 6F1–6

Page 6F1–6

3.3 Cylinder Balance Check

The cylinder balance check carries over from MY 2003 VY and V2 Series vehicles. Refer to Section 6F1 Engine Tune –

V6 Engine in the MY 2003 VY and V2 Series Service Information.

For additional diagnostic information, refer to Section 6C1 Powertrain Management – V6 Engine.