Adjust o2 flow rate with full exhaust install?
Adjust o2 flow rate with full exhaust install? Is there such a setting in hptuners? Trying to get better fuel mileage with my full exhaust. Mpg took a hit . I was reading somewhere about o2 sensor flow rate since the O2 sensors are moved from their original location. Trying to fix this and my jumping fuel trims when coming to a stop. Some instances my ltft go to -14 on both banks sometimes
Not in a sense like a ford calibration but yes there are a bunch of things to do be done if they are longtubes especially. You wanna look at your switch points (i set lower rpm to 451) and proportional fueling (the amount of fuel required to make the o2 swing rich to lean to ensure proper operation). With longtubes the amount of fuel required can be reduced quite a bit. If stock values are used, youll get slow response codes and eventually the o2 stops responding and pegs lean. My theory is the exhaust isnt hot enough causing raw fuel to hit the o2 sensor. Once you reduce these values and increase the delay a bit, should be good to go. All you need is the left column under closed/open loop fuel.
Not in a sense like a ford calibration but yes there are a bunch of things to do be done if they are longtubes especially. You wanna look at your switch points (i set lower rpm to 451) and proportional fueling (the amount of fuel required to make the o2 swing rich to lean to ensure proper operation). With longtubes the amount of fuel required can be reduced quite a bit. If stock values are used, youll get slow response codes and eventually the o2 stops responding and pegs lean. My theory is the exhaust isnt hot enough causing raw fuel to hit the o2 sensor. Once you reduce these values and increase the delay a bit, should be good to go. All you need is the left column under closed/open loop fuel.
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Verdad Gallardo Now in regards to your question. I had my maf and VE dialed in already. Though it does cause your Short terms to switch fast and bounce a lot i saw no change in my average ST or LT trim in my histograms however my proportional fueling was already changed before I did these new changes so that may be the cause.