Engine Tune – V8 Engine Page 6F3–1
Page 6F3–1
Section 6F3
Engine Tune – V8 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 – V8 Engine Page 6F3–2
Page 6F3–2
1 General Information
With the following exceptions, MY 2004 VY and V2 Series GEN III V8 Engine Tune information carry over from MY 2003
VY and V2 Series vehicles:
• new vehicle emi ssion control label,
• new spark plug with a revised spark plug gap specification,
• engine tune recommendation chart, and
• engine tuning data chart.
For GEN III V8 engine tune information not provided in this Section, refer to Section 6F3, Engine Tune - GEN III V8
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.
Refer to Figure 6F3 – 2 for a view of the vehicle emission
control information label.
Figure 6F3 – 1
Figure 6F3 – 2
Engine Tune – V8 Engine Page 6F3–3
Page 6F3–3
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 GEN III V8 engine, refer to Section 6C3 Powertrain Management – GEN III V8 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 6A3 Engine Mechanical – GEN III V8
Engine.
Also refer to 3.2 Tuning Service Notes in this
Section.
Engine Drive Belt Check. Section 6A3 Engine Mechanical – GEN III V8
Engine.
Cooling System Check for Leaks. Section 6B3 Engine Cooling – GEN III V8 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 6C3 Powertrain Management – GEN III
V8 Engine.
Fuel Filter Check and Replace. Section 6C3 Powertrain Management – GEN III
V8 Engine.
Spark Plugs Clean, Adjust or Replace. Section 6C3 Powertrain Management – GEN III
V8 Engine.
Spark Plug Leads Test for Continuity. Section 6C3 Powertrain Management – GEN III
V8 Engine.
Ignition Timing Non-Adjustable.
Exhaust System Check for Excessive Back
Pressure, General Condition
and Oxygen Sensor Operation.
Section 8B Exhaust System.
Section 6C3 Powertrain Management – GEN III
V8 Engine.
Engine Ventilation Check. Section 6E3 Emission Control – V8 Engine.
Evaporative Emission
Control Check Lines, Hoses and
Canister. Section 6E3 Emission Control – V8 Engine.
Battery and Cables Check. Section 12A Battery and Cables.
Engine Tune – V8 Engine Page 6F3–4
Page 6F3–4
3 Engine Tuning D ata
3.1 Engine Tuning Data Chart
The following engi ne tune data chart provid es con densed engine tuni ng data.
SPARK PLUGS
ENGINE TYPE TRANSMISSION IDLE SPEED
(RPM) IGNITION
TIMING TYPE GAP (mm)
Manual 800 ± 50 Denso 41-985 1.0 mm
± 0.1 mm
650 ± 50
(In Neutral) or
5.7 Litre P.F.I.
GEN III V8
Sequential
(Domestic) Automatic
Transmission 550 ± 50
(In Drive)
PCM Controlled
(Non –
Adjustable) Denso
PTJ16R15 1.52 mm
± 0.05 mm
650 ± 50
(In Neutral) 1.0 mm
± 0.1 mm
5.7 Litre P.F.I.
GEN III V8
Sequential
(Middle East)
Automatic
Transmission 640 ± 50
(In Drive)
PCM Controlled
(Non –
Adjustable)
Denso 41-985
or
Denso
PTJ16R15
or
Denso TJ16R15
1.52 mm
± 0.05 mm
NOTE
Idle speed is controlled by the PCM and varies
with:
• Battery voltage
• Engine temperature
• Air conditioning request
• Park/Neutral Switch Signal (Auto. only)
Engine Tune – V8 Engine Page 6F3–5
Page 6F3–5
3.2 Tuning Service Notes
The tuning service notes carry over from MY 2003 VY and V2 Series vehicles. Refer to Section 6F3 Engine Tune –
GEN III V8 Engine in the MY 2003 VY and V2 Series Service Information.
For compression testing procedure and specifications, refer to Section 6A3 Engine Mechanical – GEN III V8 Engine.
Engine Tune – V8 Engine Page 6F3–6
Page 6F3–6
3.3 Cylinder Balance Check
The cylinder balance check carries over from MY 2003 VY and V2 Series vehicles. Refer to Section 6F3 Engine Tune –
GEN III V8 Engine in the MY 2003 VY and V2 Series Service Information.
For additional diagnostic information, refer to Section 6C3 Powertrain Management – GEN III V8 Engine.