Thread: Trim relearn question

Originally Posted by Fivefingerdeathpunch

HP Tuners resets with the flash because it's flashing the whole file every time and I've never had an issue.

Did they change this at some point on the newer versions? I think I'm running 3.6 and I still reset trims manually.

From what I remember my LTFT would be at zero after a flash. I think my newer truck is like that as well.

Though depending on what I'm doing I hit reset set fuel trims anyway just to make double sure. So who knows, maybe I'm wrong lol.

I believe a new flash also reset the knock learn factor as well but I don't think the 3800's use that feature.

I can't say I remember any version that reset fuel trims.

Yeah, maybe not a calibration only write.

A write entire should reset everything though, but that is never required on a grand prix and only for VATS and OS changes on LS style computers.

Ah yeah. Entire writes do it. I can't actually think of a time I've done that with hpt though on a 3800.

Dhp didn't have that option in the beginning. You either had to write entire to reset trims, or disconnect the battery after a partial write to clear them. It was a huge deal when they added that option.