Quote:
Originally Posted by ember1205
When you say they are "running out of range", what does that mean and how are you measuring? A common thing that a lot of folks to incorrectly is to review these readings at idle and that doesn't tell the correct story.
Drive the car and watch the numbers under load. I have a WiFi dongle that I pair to TrackAddict on my phone. With that, I can record a diag session to play back later. Set it up, press Record, and head out for a drive. You want to be able to capture data accelerating and holding speed at highway speeds (if possible). Flat roads where you can set the cruise control to anywhere from 45 to 65 for a short bit at least will get you some good long term numbers.
It's extremely common for the numbers to be negative... That's ok as long as they don't run way down and stay there solid.
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Thankyou, this is a very good thought process. I have run my torque app and brought up all 4 fuel trims and watched it as I drove last summer for a good 100 miles. It stayed -17. I also with the HP Tuner have hard set the RPM to 1000 and let the car run for an hour to achieve the -23/-27 values just yesterday.
ALso it is winter here. keeping the RPMS at 1k-2k for an hour in my garage is the best I can do to obtain fuel trim values.
Edit I love the track addict app. I forgot about that. I will have to reinstall that. THe more data the better