Printable View
i am working on 2023 ford f150, i did replace gt500 injectors and high flow cat for my truck. everything else is stock now my short term fuel trim adding lots of fuel and it was lean after max out of learning. do u guy have any guide how to adjust fueling? ty
Attachment 161799Attachment 161800Attachment 161801Attachment 161802
Fisrt I would check to make sure all your injector data is correct. Second, Build you a histogram for STFT + LTFT or do each one separate.
thank you mstang_man. i did injectors from GT500 dial in. now i did open loop tune with my external AEM wideband. all i need to know where should i go to adjust fuel for it when it runs lear or rich.
should i go to Edit tap and speed density cal then adjust fuel there?
and how do you create EQ error for every map point? ty
No need to add an external wideband. It has 2 built in; you just have to read them. You logged both, one going lean and one flatlined at 2.00 the entire time. Fuel system is fault status. My guess is when you installed your high flow cats, you damaged the Bank1 O2 sensor or wiring, or didn't plug it in all the way. I wouldn't change anything until that is fixed. I can't tell what your fuel pressure is, but if it's over 65 then the injector data has errors. And where did you get the 3 bar MAP sensor slope and offset?
engineermike. those info came from 2023 shelby
Is this truck boosted?
Your injector data is off. Once corrected, that should improve you fuel trims.
Attachment 161896
This is how I dialed in each mapped point. I made a histogram for each mapped point that is being used. At the bottom, I narrowed down the pressure that is being used for each mapped point so I wasn't getting unnecessary information. The 85 under function meant that it will only sample data when its at that mapped point 85-100%. I hope this helps.
So you're correcting fuel trims within each mapped point? How are you doing that? Seems confusing.
thank you davem3261. do you know how to lock map point? how can i get 10% throttle from close loop to open loop?
There is no need to lock every mapped point. For example, on my truck, MP0 is only used at idle and decel. Off idle is MP1 etc. Setting up the histogram to log when the MP is at 85% or greater will get you dialed in. Take your histogram, copy and multiply by % on the speed density calculator. Most of the time, after you calculate coefficients, the values will return somewhere in between where you started and where you want to be. I would then paste again to get it closer. There may be a more efficient way to do this, but I am unsure how. Most of the guys who know better don't want to share the information. I was able to get my fueling within 2% after 12 revisions using this method.Quote:
Originally Posted by franklingreen100