2018 TA 5.7 w/ 6 Spd
its weird, my idle likes to hang like a half way stuck throttle when I rev it up to 3-4000 rpms. i took it to Dodge for a check, they said it was part of the computer programming from the factory?
been thinking about getting an unlocked pcm in prep for my ProCharger set up. Definitely want to get rid of this idle if I can?
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Have experienced this behavior with other cars. It is "normal" to help reduce emissions. Quite noticeable with my 2020 Scat Pack and its 6-speed.
Another behavior though not sure the Challengers have this -- have not "tested" this with my Scat Pack and I don't recall encountering this behavior with my Hellcat -- is if one slams the throttle to the floor the engine controller or electronic throttle control (drive by wire) will not open the butterfly in sync with the pedal.
This was most noticeable with my VW Golf TDi. I could actually get the engine to accelerate better by feeding it throttle as I felt it was able to handle more throttle. When I slammed the throttle to the floor the engine accelerated but at a more leisurely rate.
Given this was a diesel engine this was probably done to reduce particulate emissions by doing way with the "coal rolling" behavior often observed from older diesels or newer ones that have been modified to actually allow for "coal rolling" though God knows for what reason. I would think owner of one of these modified vehicles would want to try to keep a secret he's a dumbass not publicize it.