What this means to you:
- One of the most important things you will want to do after you install a properly designed aftermarket
intake system is to reset the ECU and drive at very light loads for extended periods of time after the
installation. Resetting the ECU will erase any STFT and LTFT values which will allow the ECU to start
making compensatory corrections to the fueling calculations.
- Immediately after starting your vehicle, the fuel trims are usually not active. The ECU must heat the
HEGO sensor and make sure various sensors complete system checks before the system is activated.
- The accuracy of all input triggers is critical. Using piggy-back devices that skew these triggers does
not allow the ECU to calculate the proper timing of fuel injection or ignition operations. This is critical
when trying to calculate fuel injection windows and ignition timing on a DISI engine!
- One of the most important things you will want to do after you install a properly designed aftermarket
intake system is to reset the ECU and drive at very light loads for extended periods of time after the
installation. Resetting the ECU will erase any STFT and LTFT values which will allow the ECU to start
making compensatory corrections to the fueling calculations.
- Immediately after starting your vehicle, the fuel trims are usually not active. The ECU must heat the
HEGO sensor and make sure various sensors complete system checks before the system is activated.
- The accuracy of all input triggers is critical. Using piggy-back devices that skew these triggers does
not allow the ECU to calculate the proper timing of fuel injection or ignition operations. This is critical
when trying to calculate fuel injection windows and ignition timing on a DISI engine!