LTFT Setup (Long Term Fuel Trim)




  • LTFT Post Start Lockout        -        Delay in which LTFT can become active after start up
  • LTFT Min Eng Temp Lockout        -        Minimum engine temperature for LTFT to become active
  • LTFT Max Eng Temp Lockout        -        Maximum engine temperature for LTFT to become active 
  • LTFT Min STFT Lockout (+/-)        -        The minimum STFT allowed before LTFT can start correcting
  • LTFT Update Rate                -        Update rate for LTFT
  • Long Term Gain                -        Percentage of STFT applied per second


** For STFT Lockout - 


Min STFT Lockout = +/- 2.5% The LTFT will start operating when the STFT is greater the 2.5% or less than -2.5% 


** For Long Term Gain - 


The Gain is percentage of the short term trim applied per second.


Example: Short Fuel Trim = 10.00%


Long Term Gain = 2.0%


Long Term Fuel Trim = 2.0% of 10.00% per second


Long Term Fuel Trim = 0.20%  per second