Calibration.... 
Calibrate MPG/Fuel 
MENU  Vehicle Setup ..  Calibration..  Calibrate MPG/Fuel 
This calibration is used to fine-tune UltraGauge to accurately measure fuel usage. This calibration is critical, especially for vehicles 
which use a MAP sensor, diesels and alternative fuels. 
 For vehicles that use a MAP sensor*, see the menu section on Adaptive Volumetric Efficiency before proceeding. 
 Prior to this calibration, consider performing the distance calibration. See the section: Calibrate Distance 
 Calibration cannot be performed if less than 4 liters or 1 gallon has been used. 
The gauges that depend on fuel usage will not be accurate until this calibration is complete. 
 
Calibration Procedure: 
1. Fill up the fuel tank. 
2. Set the ignition to the RUN position (Engine Off) 
3. Press and hold the UP key to cause UltraGauge to recognize the fill-up 
4. Zero the Average MPG. MENU --> Gauge/Page Menu .. --> Zero Ave MPG, G/H. 
5. Exit the Menu system 
6. Drive until it’s time for the next fuel fill-up. 
7. At the next fuel fill-up, fill the fuel tank and note the number of gallons/liters used (pumped). (Always use the same fuel 
station and the same fuel pump) 
8. Set the ignition to the RUN position (engine off) 
9. Press and hold the UP key to cause UltraGauge to recognize the fill-up 
10. Select MENU --> Vehicle Setup.. --> Calibration.. --> Calibrate MPG/Fuel, and change the value displayed to the amount 
of fuel recorded in step #7. Press MENU when complete to set and save the calibration. 
11. Exit the Menu system the cal is complete 
 
Congratulations, you have successfully calibrated UltraGauge to your vehicle. 
 
Alternatively, to improve accuracy, record and add the fuel used (pumped) over several fill-ups to improve accuracy. 
Multi-fill-up Calibration: 
1. Fill up the fuel tank. 
2. Set the ignition to the RUN position (Engine Off) 
3. Press and hold the UP key to cause UltraGauge to recognize the fill-up 
4. Zero the Average MPG. MENU --> Gauge/Page Menu .. --> Zero Ave MPG, G/H. 
5. Exit the Menu system 
6. Drive until it’s time for the next fuel fill-up. 
7. At the next fuel fill-up, fill the fuel tank and note the number of gallons/liters used (pumped). (Always use the same fuel 
station and the same fuel pump) 
a. Repeat step 6. Proceed to Step 8 after 2-4 fill ups.
8. Set the ignition to the RUN position (engine off) 
9. Press and hold the UP key to cause UltraGauge to recognize the fill-up 
10. Select MENU --> Vehicle Setup.. --> Calibration.. --> Calibrate MPG/Fuel, and change the value displayed to the amount 
of total sum of fuel recorded in step #7. Press MENU when complete to set and save the calibration. 
11. Exit the Menu system the cal is complete 
 
Make note of the calibration factor displayed at the bottom of the screen. If you should ever need to clear your configuration, the 
calibration factor can be used directly to set the calibration. Simply jump to step #10 and increase or decrease the reported gallons 
until the calibration factor matches. 
 
Ethanol fuel : Ethanol blends have less energy in the same volume of fuel. Switching between blended and unblended fuel will 
result in inaccurate fuel usage for vehicles which have a MAP sensor and no MAF* sensor. It is recommended to either avoid 
Ethanol fuel blends, or use only Ethanol fuel blends. Experience has shown that Ethanol results in reduced fuel economy. 
 
* To determine if your vehicle has a MAF sensor, access the menu; MENU  UltraGauge Setup..  Version. This will display 
MPG sensor: MAP, MAF or None 
 
Reset MPG/Fuel Cal 
MENU  Vehicle Setup ..  Calibration..  Reset MPG/Fuel Cal 
Resets the MPG/Fuel Calibration factor to the factory default of 1.000. Use this to restore the calibration factor if the 
MPG/Fuel Calibration is performed improperly. 
 
Calibrate Distance 
MENU  Vehicle Setup ..  Calibration..  Calibrate Distance 
Use this menu item to calibrate all Distance Gauges. This calibration also directly affects the accuracy of all Speed, MPG and 
DTE gauges. This calibration is especially necessary for vehicles which no longer have the stock wheels, tire sizes, 
transmission, or rear-end differential. This calibration will also compensate for inaccuracies in stock speed sensor and the 
vehicle’s distance measurement system. Perform this Calibration prior to all other calibrations. 
 
**** Calibration cannot be performed unless a distance of at least 4 Kilometers or 2.5 miles have been driven. **** 
 
To perform the distance calibration follow this procedure: 
1. Align front tire with first mile marker 
2. Reset the trip gauges: MENU  Gauge Menu  Zero All Trip 
3. EXIT THE MENU 
4. Travel to the 3rd mile marker (at 50+MPH), aligning the front tire to the mile marker 
5. Select: Menu  Vehicle Setup  Calibration  Calibrate Distance 
6. Change the value shown to 3.000 miles*, using the UP and DOWN keys 
7. Press Menu to save and set the calibration 
Once saved, the calibration factor will be displayed at the bottom of the display. 
 
Many roads will have mile markers, but avoid roads that are not straight. Generally more markers will improve accuracy. 
The greater your speed between mile markers the better the accuracy of the distance calibration 
*If you chose to travel several mile markers, then enter in the number of miles actually driven, for example, 3.000 miles. 
 
NOTE: Unplugging UltraGauge after calibration will not cause loss of calibration. 
NOTE: Using the vehicle’s odometer to perform this calibration is pointless since the odometer and UltraGauge receive 
distance information from the same source; the vehicle’s ECM. 
NOTE: For best accuracy travel between markers at a high rate of speed.(50+MPH)