My wife's '98 Jeep Cherokee has a 4.7L stroker, inline 6. Had it tuned many years ago to account for the displacement and cam change, but it was tuned for high octane fuel back then and now I want to dial that back to run on uncle Tom's cabin 5'er jugs. Saw HPT has supported the Jeep ECM for a bit, so I spent the $50 on 1 credit today and downloaded the tune that was in there.
I was expecting a lot less functionality in this Jeep ECM, having 99% of my experience with Gen 3 LS tunes, but holy cow - it seems like it's missing everything important. Can't seem to be able to verify or edit any hard parameters, like different size injectors. Can't dial in or adjust VE/fueling from what I can tell under the Airflow tab (no factory MAF on these rigs so I'm assuming it runs on speed density?). There's no controlling of the transmission shift points from what I can tell. There's no updating/correcting the tire or gear ratio, which you'd think is an important aspect for the Jeep community (but I admit most of us just swap out the gear in the transfer case tail housing).
Am I missing something in my HPT version or something? Or is the Jeep just really limited in HPT?
MODS any input?
Jeep First Read 8.14.2022.hpt