Software & Tuning

Download Tunerstudio MS version 3.0 first….it can be downloaded HERE

Select your Engine Size Tune for download HERE Password is in your paperwork.

If you need Remote Tech Support, download HERE and call tech support and you will be provided a code so that we may remotely access your Laptop.

Your ECU comes pre-programmed for the approximate engine size (injectors) your have.  You will need to setup a new project before you can upload your setting from the ECU to your computer.  After they are upload, you can change/manipulate, etc and then save back to the ECU.  Be careful as some changes to timing and fuel can create lean situations that can burn pistons, valves, etc.  Some setting in the program/project need to be setup for your engine. 

Computer/ECU Adjustments

Your kit included a ECU to Laptop USB to 2.5mm cable.  Plug the 2.5mm cable into the 2.5mm female plug and the USB to your laptop.  Your Windows based laptop will find the driver and install a Comm

Port, note that Comm port as you will need to connect the TunerStudio program to your ECU.  In this section, items in Blue are clickable in the TunerStudio Program.  We recommend that you purchase the TunerStudio Program as it give you the ability to change your dash, auto-tune (you drive and it adjust your fuel table for you) which is helpful for the users that have an engine outside the normal.  Make constant backups of your tune that way you if you make a entry to make your engine run worse, you can revert back easily.  Do not be overwhelmed by tuning… it is like eating an elephant… one bite at a time.  We suggest you only change 1 entry at a time and test drive as make 2 or more changes at a time may cause confusion and starting over waste time and fuel. 

First Time Setup of TunerStudio MS:  Open Program, Open New Project, Name your project, Detect Firmware and add notes if you want about your engine size, cam, etc.  Next Screen will ask for selection of options.  Input if you have Narrow Band (what shipped with your kit) or Wideband O2 Sensor.  Press Next and will ask you to setup your Comm Port

ECU Adjustments (under construction):  You can change the following settings in the ECU very easily and tailor your engine for your setup and desires.  You must first connect your laptop with the cable between the USB and the 2.5mm audio.  Open the software and create new project (After creation, you can open existing).  Open communications, settings and set the Comm port to the one noted earlier.  Test Port and you should receive a “successful” message and press Accept.

The Basics:

Note:  The temp indicated may not be accurate and not reflect the actual temp, but it does not matter as you adjust your engine with those values not the actual temp. 

Priming Pulse:  When you first turn on the switch, the ECU triggers the fuel pump to energize for 5 seconds, but it can also open the injectors to allow trapped air to escape and refill the lines after bleed-down. This is usually helpful when the engine has not be started for an extended period of time. To adjust the priming pulse, open Startup/Idle then Priming Pulse.  The pulse is determined by temp and can be adjusted as needed.  Most engines will not need adjustment unless your have a leak in the pressurized part of the fuel system. 

Cranking Pulse:  This injects fuel only while the engine is cranking and has not exceeded the “Started RPM” (400 RPMs) threshold.  After the started RPM threshold has been reached/exceeded the “After start enrichment” takes over.  If your engine if flooding during cranking (you may have to hold throttle down to clear it), you may be injecting too much fuel during start.  Keep in mind, if you press your accelerator to past 70% TPS, it will stop injecting fuel to help clear a flooding situation

After Start Enrichment:  This injects fuel during the period after cranking pulse has ended and enters a  running state.  Adjustment of this would be helpful to add a little extra or take away fuel to achieve accelerator free starting. 

Warm-up Enrichment (WUE):  This is basically Choke Emulation and may be adjusted for user preference.  To adjust, open Startup/Idle then Warm-up Enrichment.  This adds fuel to the engine based on temp and amount of choke.  100% is off, so you may actually go below 100% (taking fuel away), but not recommended .  Adjust 100-200% against temp and test drive.  WUE has green light on the main screen to indicate the that engine is in choke mode and will stay illuminated until it reaches threshold temp.   

Cold Advance:  The ECU will add timing based on the temp of the engine and is helpful during cold starts/weather.  Adjust the Cold advance by opening Ignition Settings then Cold Advance.

MAT Based Timing Retard:  This is designed to measure air temp, and is mounted inside the TBI to measure the average temp entering the TBI.  The engine uses this temp to retard the timing to prevent pinging as the intake temp continues to rise.   Adjust the Timing Retard by opening Ignition Settings then MAT based Timing Retard.

Accel Enrichment:  Acceleration Enrichment is equivalent of a accelerator pump in a carb engine.  Adjust the Accel Enrichment by opening Accel Enrich then Time Based Accel Enrichment.  Do not make adjustments on this section until the engine is fully warmed as it may still have additional fuel added by the “WUE:. 

Timing Adjustments:  You can adjust the timing based using a 16×16 table.  This will allow you to advance or retard the timing based on load and RPMs.  Keep in mind that the timing is also being advanced while cold and retard when hot by the Cold advance and MAT based timing retard above.  To advance the timing, go the to cell that corresponds to the load and RPM and type in the amount of positive degrees and when that cell is active, the ECU will change the engine timing to match.  We set the timing to very conservative (low) on the base tune and you can increase the table values as needed.

Fuel Adjustments:  We recommend that you do this only with a Wide Band O2 sensor as leaning an engine out too much will burn pistons, valves and overheat the engine. Some may want to run leaner on highway settings, but without an WBO2, its guessing.  Richer is always safer when in doubt….gas is cheaper than pistons.

Engine Temp Sensor:  The Engine Temp Sensor is located at the #4 Cylinder location shroud bolt and is designed to tell the ECU if the engine is cold, warm or hot.   Exact temp is not as important as where on the scale the choke and RPM are adjusted due to temp.  

To perform this calibration, you will need to unlock the calibration tables first:

Go to Tools  and  Un/Lock Calibration

The following setting are for Brown EFI Head Thermistor only!

Go to Tools and Calibrate Thermistor Tables

Coolant Temperature Sensor and Air Temperature Sensor  (Set Both)

Three Point Therm Generator

Select Ford from the Drop Down

Write to Controller and Close

For 140 Engines, there is no place to bolt into the head, so the  3/8″ bolt hole near the #4 cylinder position is chosen on the driver’s side TBI.  During the setup of Thermistor tables, select the Ford sensor setting. Another reason to chose a predefined setting is that if that sensor is unplugged/disconnected for any reason, it goes to mid-scale.  Sensor that have defined scales (as above) will read zero (0) when disconnected and may cause rich running, etc…. so use with care and remember this step during troubleshooting.

Throttle Position Sensor (TPS) Calibration

Go to Tools and Calibrate TPS

Initial TPS Calibration:  We have preset the TPS to +10% on the GM Scale, so you should not need to perform the initial setup of installing the TPS.  Power up the system and see what reading your get on the ADC count (should be between 1 and 30).  Rotate the shaft to check that TPS percentage is changing on the dashboard and is smooth without jumping.  If these items indicate as stated, you can now mount the TBI ad install linkage to that TBI,  We recommend not tightening the fuel lines until the TPS calibration has been verified.  After all connections have been made, you can now check the TPS calibration with the accelerator pedal as specified below.

Without pressing the accelerator and with the choke advance not advancing the throttle, click the Get Current on the Closed Throttle ADC Count (it will probably read higher than 0 – Approx 10-30).  Now fully press the accelerator and click Get Current Full Throttle ADC Count.  Click Accept and window will close.  You can re-run this calibration as many times as needed.

Lock your tables after you have finished as not to accidentally change settings.

Links for Tuning:

Setup TunerStudio

Idle Tuning (Megasquirt, but essentially the same)

Dialing in the Start-up

Enrichment Tuning (Accelerator Pump Shot)

Ampseal Connector Instructions


Brown EFI systems are intended for off-road use only.