Using the Gratec Gasoline software

The Gratec Software is a sophisticated yet user friendly program in which configures the Gratec CNG or LPG system to perform with your vehicle. Software version 2.002 is our latest version which was released to our new OBD ECU.

Connecting to the Gratec ECU requires a special Gratec tuning cable. Steps to successfully connect: 1. Plug tuning cable into port on ECU and laptop 2. Press the Port then autoconnect button in the software (F10 key). You will know you are connected when the Status no longer blinks red in the lower left corner of software.

If connection cannot be made with the Gratec ECU please verify that you followed the correct steps in connecting. Press F10 to start autoconnect Make sure you are using an authentic Gratec tuning cable Make sure the most up to date software is being used Verify fuse is in fuse holder Verify 12 Volt ignition key has correct voltage readings and key is in the on position Start vehicle and verify same conditions

The Gratec ECU is designed with three different options when tuning. Beginner features, intermediate features and advanced feature. Step 1: Change parameter LPG or CNG. Step 2: Go through auto-calibration Step 3: Select Automatic Mapping to fine tune the injection system for all driving conditions. Step 4: Enable corrections from OBD. Enjoy driving the Gratec System!

File: Under this bookmark you have the ability to save and load tunes into the Gratec ECU Port: connecting and disconnecting to the Gratec ECU Options: Select different major bookmarks in software View: Change from basic and advanced software mode Language: Change the language of software Help: Folder empty at this time. Find all wire diagrams on our website.

The lower parameters bar is available on every bookmark and shows key parameter values. Level: Shows button as seen inside cab and also shows fuel level RPM: Shows current RPM of vehicle Vacuum: Vacuum manifold pressure of vehicle Injectors 1-8: Shows gasoline and CNG/LPG injector pulse value When CNG/LPG injectors are off the word off will be read Pres. Diff: CNG/LPG pressure in the low pressure line Gas Temp: GAS temperature in low pressure line Reducer T.: coolant temperature in regulator OBD Port: if connected will show live data of vehicle (green means OBD successfully connected; red X means no connection) ST: Current Short Term Fuel Trim of vehicle LT: Current Long Term Fuel Trim of vehicle

Readings (F2): Visualization of basic parameters Parameters (F3): Changing of parameters inside the Gratec ECU. Mapping (F4): calibration in driving conditions Advanced Map (F5): advanced manual modification of time injection correction Diagnostic (F6): System diagnostics as well as OBD connection and configuration Adaptation (F7): Autocalibration of the engine at idle Advanced (F8): Advanced options in the Gratec ECU (option only available if advanced view enabled)

Regulator Temperature: This is the temperature of the coolant being circulated through the regulator GAS Temperature: Temperature of the GAS in the low pressure line Revolutions (RPM): RPM of the vehicle Pressure [Bar]: Pressure the GAS is currently at in the low pressure line from regulator Petrol Injectors: Current injection pulse of the gasoline injectors GAS Injectors: Current injection pulse of CNG or LPG injectors Level [V]: This indicated the amount of fuel in the CNG or LPG fuel tank Live Readings Graph: This graph enables you to select desired parameter to view in live graph form

Parameters: Changes general parameters in Gratec ECU Sensors: Select CNG or LPG gauge type Functions: Injector heating, switch options and Mazda strategy mode Service and Other: External relay driver, service vehicle option, injection sensitivity and acceleration enrichment options

RPM Type: Select correct engine type Signal: Select type of signal for RPM may get RPM from injector signal Turbo: If your vehicle has a turbo select turbo engine Cylinders: Select the correct number of cylinders that your vehicle has Fuel Type: Select LPG or Natural Gas

Select your GAS injector type If using Barracuda injectors select Barracuda If using HANA injectors select HANA H2000 green If using other custom injector select that now

RPM: Select the RPM at which your vehicle will initially switch to the alternative fuel. Recommended: 1100 TEMP: Select the temperature (in Celsius) at which the coolant must reach before switching to the alternative fuel. Recommended: 40 Cylinder Time: The time between each successive switch of a cylinder to the alternative fuel. Recommended: 0.25-1.00 Delay: The delay from initial engine start to the time the engine will switch to the alternative fuel (in seconds). Recommended: 15 Gas fill time:

Min. Pressure This is the minimum pressure in low pressure line before the ECU switches back to gasoline (automatically set during auto-calibration) Delay The number of time in which minimum pressure value must stay lower to switch back to gasoline Must select button to receive below options Min. RPM Minimum RPM value vehicle will revert back to gasoline Back to GAS after min. RPM If you want the vehicle to automatically switch back to the alternative fuel when above this minimum RPM Max RPM maximum RPM value and vehicle will switch back to gasoline Max Inj Maximum injection pulse (load) before ECU switches back to gasoline

Reducer Temperature Sensor: Select correct reducer temperature sensor used. Recommended: (SM033) 4k7 Lambda: Select correct lambda signal used on this OEM vehicle. Not Required Connection Level Setup: Select correct level sensor used. CNG uses 806, LPG uses LG1050

GAS Temperature Correction optional tab that will allow you to adjust GAS mixture based on GAS temperature Reducer Temperature Correction optional tab that will allow you to adjust GAS mixture based on coolant temperature

Running this function prepares the injectors to switch to the CNG or LPG supply through the power of short pulses that are on the border of the injector actuation. This function is especially useful when the ambient temperature fluctuates around freezing. Select the number of cycles you wish injector warming feature to perform when in cold climate

Brightness: Brightness of LEDs on button Volume: select volume of buzzer Silent on/off: selection of when buzzer sounds Gas start: Vehicle will start on alternative fuel Extras to obtain menu select RPM and injection cut: if on, system will beep each time RPM or injection cutoffs are reached Empty tank beep : number of beeps when alternative fuel tank runs empty Error beep : number of beeps if ECU is alerted about CNG/LPG system error

External Relay Driver: if using an external driver please select when that driver will be activated and when It will be off. Service: Select service period until vehicle needs to come back to shop for service Extra Injection Sensitivity: some vehicles may require an increased injection sensitivity Accelerate Enrichment: to add some power when accelerating you will activate accelerate enrichment and adjust enrichment value

Collecting Gasoline Points: while driving vehicle on gasoline points (red) will automatically be collected to build the gasoline fuel map Collecting CNG/LPG Points: while driving the vehicle on the alternative fuel it will automatically collect points (green) for CNG/LPG fuel map Calculating Correction: after gathering gasoline and CNG/LPG fuel map if the graphs do not look similar you will press calculate map which will automatically fine tune your CNG/LPG fuel map to run like your gasoline engine

*ALL VALUES ARE PRESET DURING AUTO- CALIBRATION* Main Enrichment: main GAS correction of the overall CNG/LPG map Idle Correction: GAS correction while vehicle is at idle Work Pressure: the working pressure in the low GAS pressure line during normal idle condition

These values allow you to manually adjust the mixture throughout the graph and any given area. Click on the box you want to manually make changes and then select the +1,-1,+5 or -5 button to add or subtract fuel in that area Smooth will make changes to graph to smoothen the transition and not allow it to be so abrupt

This advanced tuning map allows for manual mixture adjustment at any point of the map This map is for advanced tuning only and is optional Simply select the spot of the graph and use the +1, - 1, +5 or -5 buttons to increase or decrease mixture in a given area

In the Diagnostic Bookmark you will find OBD correction settings as well as other OBD parameters, live data recorder and Gratec ECU system diagnostics information

Injectors tab allows you to turn some injectors to gasoline and others to the alternative fuel to diagnose a problem Sequence visualization allows you to set the switching of cylinders to match the OEM firing order

This area stores any trouble codes set by the Gratec System. If a problem occurs in the Gratec system the fault code will be registered here. Return to Gas after error: If you want the vehicle to attempt to run on the alternative fuel after a code is set If severe code is set it will not run on the alternative fuel After problem is fixed select erase errors to clear codes

This tab will give you the ability to enable the OBD system (if wires connected), enable automatic correction from OBD parameters and reading any OBD check engine light errors Reading all OBD live parameters can also be done on this bookmark

This area reads errors that are set by the OEM system causing a check engine light Read OBD errors: Reads any error set by the OEM diagnostic system Erase OBD errors: Erases any current code set by OEM OBD system. Read all data: Reads the data from the OBD system

When the OBD/CAN connection is enabled it allows for all live data that is given by OEM OBD system. If vehicle does not support a live data option it will be greyed out You can select or unselect parameters to view to not view the live data

Logging allows you to monitor the drivers driving pattern over an extended period of time Start Logging: This will begin the logging period of the driver End Logging: Ends the logging period and will allow the file to now be replayed

Record driving allows you to record the driving parameters over a single drive To start the recording process simply press the start button After the single drive is complete you can press the stop button to save the recorded drive for further examination

After the data has been successfully recorded you will replay the drive here Simply open the recorded file and press play You can stop the recording at any time for closer parameter examination

In this bookmark the auto calibration at idle takes place This ensures your vehicle is initially calibrated at idle and injectors are correct sizing

Push the Start button You must wait until regulator is to operating temperature You will be prompted to turn A/C off and lights on The calibration will automatically begin and each cylinder will switch individually and gain correct mixture It will alert you once auto-calibration is complete When vehicle is running there will be a guide in the upper right corner that will indicate nozzle size too big or too small.

Advanced Bookmark will only be visible if view is in advanced mode This tab will give advanced options of injector settings, correction adjustments and MAP adjustments

Enrichment from differential pressure: Can richen areas of the map based on differential pressure value Offset from differential pressure: Can offset the entire map based on differential pressure Minimum Injection time from differential pressure: Allows installer to set a minimum injection time allowed at a specific differential pressure

Can set a minimum gasoline injector injection time in which the Gratec ECU reverts back to gasoline.

Map from manifold pressure: Allows mapping based on Vacuum of engine Map from differential pressure: allows for advanced calculation and mapping based on differential GAS pressure in the low pressure line Map from gas pressure: Allows mapping based on actual gas pressure in the low pressure line Map from injection time: Allows mapping and correction based on injection time

Injector settings allow you to increase maximum injector time before switching to gasoline Adjust CNG/LPG current injection pulse sensitivity Adjust the max pressure correction calculated from other system sensors Adjust GAS injector delay time