How To Setup TunerStudioMS
Before beginning the procedure this article outlines, please be sure that that you have already downloaded and installed our software package to your tuning laptop, and you have installed firmware...
Read MoreMS3Pro & MS2 Megasquirt Wideband Installation
Wideband Overview A wideband oxygen (O2) sensor is vital for tuning and monitoring the air-fuel ratio (AFR) in engines, particularly when utilizing aftermarket Engine Control Units (ECUs) like Megasquirt. Unlike...
Read MoreMS3Pro Programmable On/Off Outputs (Advanced)
Bitwise Operations and Loops This is an advanced level topic. Be sure you have read and understand Part 1, Basic On/Off Outputs before continuing with this article. [section 7.8.23 in...
Read MoreMS3Pro Programmable On/Off Outputs - (Basic)
We will be going through the entire process needed within TunerStudio to set up a Programmable On/Off Output. In this example, we are specifically using the MS3Pro Evo ECU, however...
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MS3Pro Injector Deadtime
Injector deadtime is a critical factor in precise EFI tuning, especially at idle and low pulsewidths. This article explains how MS3Pro handles injector latency, how to enter accurate data, and...
Read MoreMS3Pro Closed Loop Idle - PWM Valve
In this guide, we’ll walk you through the fundamentals of setting up and tuning Closed Loop Idle Control - PWM Valve. Our aim is to present the information in a...
Read MoreMS3Pro Closed Loop Idle - Stepper Valve
In this guide, we’ll walk you through the fundamentals of setting up and tuning Closed Loop Idle Control - Stepper Valve. Our aim is to present the information in a...
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The EFI Tuners Guide Chapter 5A -The EFI Fuel System: Overview
An overview of the EFI Fuel System and it's major components, discussing fuel tanks and cells, fuel pumps, filters, regulators, etc. A high level of how to design a complete...
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The EFI Tuners Guide Chapter 5B -The EFI Fuel System: Fuel Tanks and Pumps
Understanding EFI Fuel Systems and Fuel Pump needs for your project. How to convert your carb'd fuel tank over for use with Electronic Fuel Injection on a Carb-To-EFI project, and...
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The EFI Tuners Guide Chapter 4 - Electronic Fuel Injection Options - TBI, MPFI, SPFI, ITBs and DI
Updated September 2022 by Jerry Hoffmann Chapter 4: Electronic Fuel Injection Options - Throttle Body Injection (TBI), MultiPort Fuel Injection (MPFI), Sequential Point Fuel Injection (SPFI), and Direct Injection (DI)...
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The EFI Tuners Guide - Glossary of Terms
Updated August 2022 by Jerry Hoffmann EFI Tuners Guide - Glossary of Terms This is a living document that I'll be updating as I continue to write future chapters of...
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The EFI Tuners Guide Chapter 3 - Garbage In, Garbage Out: The Three Stages of Success
Updated September 2022 by Jerry Hoffmann Chapter 3 - Garbage In, Garbage Out: A properly installed, configured, and tuned Engine Management System makes all the difference (The Three Stages of...
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The EFI Tuners Guide Chapter 2 - Why should you convert to Electronic Ignition Control?
Updated September 2022 by Jerry Hoffmann Chapter 2: Why should you convert to Electronic Ignition Control? And what is a timing table? Timing Tables and Advance Curves in a...
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The EFI Tuners Guide Chapter 1 - Why should you convert to Electronic Fuel Injection?
Updated September 2022 by Jerry Hoffmann Chapter 1 - Why should you convert to Electronic Fuel Injection? “EFI is more user-friendly than carburetion and will help the more novice tuners....
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Tuning Tips for Pro Results!
Some of the best engine tuning tips I can give you have precisely nothing to do with tuning. In this article, we’re not going to talk about the impact of...
Read MoreUsing the Tooth Logger and Composite Logger
TunerStudio's tooth logger and composite logger are powerful tools for troubleshooting problems with the MegaSquirt's RPM input. These are both under the Diagnostic and High Speed Loggers menu. The tooth...
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The EFI Tuners Guide Appendix A: How to modify a carbureted fuel tank for EFI
Updated October 2022 by Jerry Hoffmann Carb-To-EFI Conversion: How to modify a carbureted fuel tank for EFI use So you're converting a factory carb'd car or truck over to EFI...
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MS3Pro & MS2 MegaSquirt Output Test Modes
The MegaSquirt Output Test Mode is a robust tool for troubleshooting your EFI installation. This feature enables you to manually toggle inputs and outputs to test components such as coils...
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Loading MegaSquirt firmware using TunerStudio
This guide walks you through the complete process of updating your MegaSquirt ECU firmware using TunerStudio. From backing up your tune to flashing the firmware and restoring your config, each...
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MS3Pro Failsafe Features & Engine Safeties
The MS3Pro series includes powerful failsafe capabilities to help safeguard your engine. This guide walks you through configuring limits for air/fuel ratio, coolant temperature, oil pressure, and more—using real-world strategies...
Read MoreControlling Gauges with MS3
Updated 12/8/2020 So, you're putting the MS3 in a car with ECU controlled gauges - or that engine you've swapped in doesn't have the right sensors to run your existing...
Read MoreTroubleshooting Communication Issues
If TunerStudio isn’t connecting to your MegaSquirt ECU, don’t panic. This guide covers step-by-step troubleshooting for USB and serial connections, COM port conflicts, driver installation issues, and common setup mistakes—helping...
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MegaSquirt Acceleration Enrichment Tuning
Acceleration enrichment (AE) is key to responsive throttle behavior in EFI systems. This guide breaks down the difference between TPS-based and MAP-based AE, explains how to tune pulsewidths and taper...
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Idle Tuning for MegaSquirt
This comprehensive guide to idle tuning in MegaSquirt covers all the essentials: idle control types, IAC valve setup, throttle stop adjustments, and tuning strategies for both open-loop and closed-loop systems....
Read MoreDialing in the MegaSquirt Startup Sequence
Starting issues can frustrate even seasoned tuners. This MegaSquirt startup tuning guide walks through the essential settings—cranking pulsewidths, afterstart enrichment, coolant-based fuel trims, and warmup ignition advance—to help you achieve...
Read MoreSetting Up and Troubleshooting Stepper IAC Control on MegaSquirt
This guide explains how stepper-style idle air control (IAC) valves function, when to use them, and how to set them up in MegaSquirt-based EFI systems. From initial wiring to tuning...
Read MoreMegaSquirt EMS Engine Tuning Information
Learn how to perform safe and effective street tuning using your MegaSquirt ECU and TunerStudio. This article explains how to capture datalogs, refine air/fuel ratios, smooth drivability, and adjust ignition...
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How To Check and Set Base Ignition Timing
Base timing is the foundation of any EFI ignition strategy. This guide explains how to use a timing light and your MegaSquirt software to align commanded spark timing with real-world...
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