Megasquirt-2 Setting up Megasquirt-2 Product Range MS2/Extra 3.4.x Dated: 2019-01-11 Instructions for setting up your Megasquirt-2 ECU. This version of the documentation applies to the Megasquirt-2 range of products which includes: • MS2 on V3.0 or V3.57 mainboard; • MicroSquirt; • Products derived from the MicroSquirt Module (e.g., DIYPNP and MSPNP2). and running firmware MS2/Extra 3.4.x. (See section 2.10.3 for more detail on version numbers.) Not covered: • Megasquirt-2 products running "Bowling and Grippo" firmware. • Megasquirt-2 products on a V2.2 mainboard. • MegaSquirt-1; • EMS-Pro • MegaSquirt-3; • MS3-Pro or products using MS3-Pro module • MS3-Gold (c) 2014-9 James Murray Megasquirt-2 Setting Up 0:QuickStart Guide - in brief 0: QuickStart Guide - in brief This list is provided as the bare essentials that you must read. Full details of each step are provided within the body of the manual. 1. Buy or build your Megasquirt! 2. Select and assemble your fuel and ignition systems. 3. Setup your vehicle wiring harness ensuring it is fused. 4. Connect MAP hose to full vacuum source. (Speed Density only.) 5. Install TunerStudio and Megalogviewer software onto you computer. 6. Connect your Megasquirt to a 12V fused supply either in the vehicle or on the bench. 7. Get the serial comms set up. 8. Install the firmware if required. 9. Get your tuning computer to talk to the ECU. 10. Setup sensor calibrations to match hardware. (TPS, O2 sensor, temp sensors.) 11. Check all sensor inputs are reading sensibly in TunerStudio. 12. Set the base settings (engine type, ignition setup, toothed wheel type.) 13. Use the test mode to confirm injectors and coil(s) are functioning. 14. Check for RPM input. 15. Check the cranking timing with fuel disabled. 16. Start the engine and start tuning. All manuals are available to download as PDFs from www.msextra.com/manuals Your supplier may have included them on a USB pen drive or CD-ROM. All parts are sold for OFF ROAD RACE-ONLY ground-vehicle use only - see section 1.1 for more details. (c) 2014-9 James Murray 2019-01-11 Page 2/117 Megasquirt-2 Setting Up 0:Contents 0: Contents Table of Chapters 0: QuickStart Guide - in brief.................................................................................................2 0: Contents............................................................................................................................3 1: Introduction.......................................................................................................................9 2: QuickStart Guide - expanded..........................................................................................13 3: Tuning the engine............................................................................................................45 4: Advanced topics..............................................................................................................64 5: Troubleshooting...............................................................................................................85 6: Appendix A: Firmware upgrade notes.............................................................................96 7: Appendix B: Fuel calculations.......................................................................................103 8: Appendix C: Megasquirt Glossary of Terms..................................................................105 9: Appendix D: Text-based firmware loader......................................................................112 10: Revision history...........................................................................................................117 (c) 2014-9 James Murray 2019-01-11 Page 3/117 Megasquirt-2 Setting Up 0:Contents Contents 0: QuickStart Guide - in brief.................................................................................................2 0: Contents............................................................................................................................3 1: Introduction.......................................................................................................................9 1.1 Emissions and disclaimer...........................................................................................9 1.2 Required tools.............................................................................................................9 1.3 How to use the manuals.............................................................................................9 1.4 Products Covered.....................................................................................................10 1.4.1 MS2 on V2.2 mainboard....................................................................................10 1.4.2 MS2 on a V3.0 mainboard.................................................................................10 1.4.3 MS2 on a V3.57 mainboard...............................................................................11 1.4.4 Microsquirt.........................................................................................................11 1.4.5 Microsquirt-module............................................................................................12 1.5 Copyrights.................................................................................................................12 2: QuickStart Guide - expanded..........................................................................................13 2.1 Buy or build your Megasquirt!...................................................................................13 2.2 Select and assemble your fuel and ignition systems...............................................13 2.3 Setup your vehicle wiring harness (loom) ensuring it is fused.................................13 2.4 Connect MAP hose to full vacuum source................................................................13 2.5 Install TunerStudio and Megalogviewer....................................................................13 2.6 Power up your ECU..................................................................................................13 2.7 Get the serial comms set up.....................................................................................13 2.8 Turn off "Hide extensions for known files types" (Windows Only)............................16 2.9 Install the firmware if required..................................................................................17 2.10 Get your tuning computer to talk to the ECU..........................................................18 2.10.1 TunerStudio basics..........................................................................................23 2.10.2 Firmware, TunerStudio, tune files (MSQ) - what's all that?.............................24 2.10.3 Version numbers..............................................................................................24 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 system version......................................................................................25 2.11 Setup sensor calibrations to match hardware........................................................25 2.11.1 Calibrate TPS...................................................................................................25 2.11.2 Calibrate MAP/Baro.........................................................................................26 2.11.3 Unlock calibrations...........................................................................................27 2.11.4 Calibrate CLT and MAT sensor........................................................................27 2.11.5 Calibrate AFR table (O2 sensor).....................................................................28 2.11.6 Lock calibrations..............................................................................................29 2.12 Check all sensor inputs are reading sensibly in TunerStudio.................................29 2.12.1 MAP sensor check...........................................................................................29 2.12.2 TPS check.......................................................................................................29 (c) 2014-9 James Murray 2019-01-11 Page 4/117 Megasquirt-2 Setting Up 0:Contents 2.12.3 CLT sensor check............................................................................................29 2.12.4 MAT sensor check...........................................................................................29 2.12.5 O2 sensor check..............................................................................................29 2.12.6 MAF sensor check...........................................................................................29 2.12.7 Battery voltage check......................................................................................29 2.13 Set the base settings..............................................................................................30 2.13.1 Control Algorithm choice.................................................................................31