MegaSquirt 2 User instructions
Megasquirt-2 Setting up
Megasquirt-2 Product Range
Dated: 2019-01-11
Instructions for setting up your Megasquirt-2 ECU.
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2.10.3.1 Mainboard version.................................................................................................24
2.10.3.2 Firmware Version..................................................................................................24
2.10.3.3 TunerStudio Version..............................................................................................25
2.10.3.4 MegaLogViewer Version.......................................................................................25
2.10.3.5 Operating s stem version......................................................................................25
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2.14.4.1 Using the test mode to determine stepper homing steps.......................................38
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3.4.1.1 AFR table (SD)........................................................................................................48
3.4.1.2 VE table (SD)..........................................................................................................49
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3.4.4.1 MAF transfer curve.................................................................................................51
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3.4.4.2 AFR table (MAF)....................................................................................................52
3.4.4.3 VE trim table (MAF)...............................................................................................52
3.4.4.4 MAFload.................................................................................................................53
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3.4.5.1 ITB Load TPS Switchpoint Curve..........................................................................54
3.4.5.2 ITB Load at TPS Switchpoint Curve.......................................................................54
3.4.5.3 AFR Table (ITB)......................................................................................................54
3.4.5.4 VE Table (ITB)........................................................................................................54
3.4.5.5 ITB technical...........................................................................................................54
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3.4.6.1 Main accel enrich settings menu.............................................................................57
3.4.6.2 Time-based Accel....................................................................................................57
3.4.6.3 Getting it dialed in...................................................................................................57
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3.4.7.1 Priming pulse...........................................................................................................60
3.4.7.2 Cranking pulse.........................................................................................................60
3.4.7.3 Afterstart (ASE) percentage adder...........................................................................60
3.4.7.4 Afterstart (ASE) taper..............................................................................................60
3.4.7.5 Warmup enrichment percent multiplier...................................................................60
3.4.7.6 Putting it all together...............................................................................................60
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4.9.5.1 PWM polling...........................................................................................................79
4.9.5.2 Digital ports.............................................................................................................79
4.9.5.3 PWM outputs...........................................................................................................79
4.9.5.4 CANADCs...............................................................................................................79
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5.4.1.1 Windows device.......................................................................................................92
5.4.1.2 Mac OS X device....................................................................................................92
5.4.1.3 Linux device............................................................................................................93
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1: Introduction
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1.1 Emissions and disclaimer
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1.2 Required tools
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1.3 How to use the manuals
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1.5 Copyrights
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2: Quic Start Guide - expanded
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2.1 Buy or uild your Megasquirt!
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2.2 Select and assem le your fuel and ignition systems.
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2.3 Setup your vehicle wiring harness (loom) ensuring it is fused.
Wiring and wiring diagrams are covered in the Hardware Manual for your specific product.
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2.4 Connect MAP hose to full vacuum source.
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2.5 Install TunerStudio and Megalogviewer
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2.6 Power up your ECU
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2.7 Get the serial comms set up
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2.9 Install the firmware if required
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2.10 Get your tuning computer to talk to the ECU
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Table of contents
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