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Contents
Introduction:................................................................................... 3
Tuning Methods:............................................................................ 5
Signal Modifiers:…...................................................................................... 8
Signal Clamps:.............................................................................................. 8
Signal Delay:…............................................................................................... 9
Tools For Tuning:........................................................................ 14
Scan Tools: .................................................................................................. .15
Wide Band AFR Display Unit:............................................................. 15
Data Logging: .............................................................................................. 16
The Chassis Dyno: ................................................................................... 16
ECU Operating Modes:.............................................................. 17
Closed Loop Mode: ................................................................................. 18
Open Loop Mode:...................................................................................... 18
Fuel Cut:.......................................................................................................... 19
Tuning (Not Yet!):......................................................................... 19
Perform Your Maintenance:............................................................. 19
Ready for Tuning (Almost!), Learning the iEMS3:............. 21
Gear Selection:......................................................................................... 72
Altitude Changes:................................................................................... 72
Temperature Changes:........................................................................ 73
Ignition Retard Map:............................................................................. 73
E85 Ethanol Conversion:................................................................... 74
Detonation and Pre Ignition................................................................. 80
To Spray or not to Spray!...................................................................... 92
iEMS3 Datalog Examples Explained.............................................. 96
Wiring examples and Technical Information.......................... 101
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