Googling, I found this to be a wide spread issue. It seems some TSB was released (TSB 18-021-09) which best I can tell was a CAL update and this problem was introduced and then superceded by TSB 18-021-09a . Several folks have opened cases with Chrysler which ended up with engineers saying it's normal. Mostly 6 speed cars are the ones who say they have issues, but a few autos as well, and interestingly, a new TSB was released that seemed to fix the problem with the autos, but I don't think anything was ever released for the 6 speeds. The TSB for the Autos was TSB#18-020-11 which states:
Driveability Improvements:
a. Lacks Performance. Some driving conditions can produce circumstances where
some customers may perceive more pedal effort is required to get the Powertrain to
accelerate the vehicle as desired. The PCM calibration for pedal vs. torque
relationship was changed to allow for more torque delivery at less pedal effort/travel.
In accordance with this PCM calibration change, the TCM was re-calibrated to
The issue is shows up as very obvious in data logs.
Here are some threads on the problem that pulled up from a Google search. The first one has the most info and describes the problem I'm having exactly. The issue is most pronounced in 4th gear.
http://www.challengerforumz.com/showthread.php?t=64536
http://www.challengertalk.com/forums/f5 ... lay-43755/
http://www.challengertalk.com/forums/f5 ... nse-37353/
http://www.challengertalk.com/forums/f5 ... 09a-36050/
Here are some screen shots from the data log:
In this screen shot, you can see the pink line is my pedal position and the purple lines are the throttle blade and TPS volts. Notice that the follow each other like they should. There is no issue here. This is cruising along in 4th and easing on and off the throttle 3 separate times.
Now, after the adaptives do whatever they do, this occurs immediately after going WOT and resuming normal driving. Notice how the pink line (me stepping on the throttle) comes quite a bit before the TPS volts and throttle blade respond. This feels like the throttle is dead then the car bucks forward like it tries to catch up. This is cruising along in 4th about 40mph and just easing on and off the throttle three separate times.
Finally, this shows how severe I can make it. This is me just pumping the throttle quickly......notice the pedal is being pressed over and over and over (pink spikes) but the throttle TPS nor the throttle body ever respond at all. Obviously I wouldn't normally drive like this, it was just a test for demonstration.
I can literally pull over, reload the tune in the car, and it's fine again until I go WOT and it instantly returns.
Did anyone ever hear of a TSB solution for this on 6 speed cars? Obviously I can't go to the dealer to get it at this point, but I'm taking the long shot that maybe it's something AJ hasn't heard about but someone else has and he can apply it to my PCM.
We even went as far to have me pull the PCM and mail it to him and he completely reflashed it to a new CALID and we still have the problem, so it's something to do with a CALID update from Dodge.
My only other option is to send the PCM back to him, have it flashed back to the CALID that worked with the Predator, and dump the Trinity, or keep the Trinity as only a data logger and use the Predator to load tunes.
If there's any info out there I'd sure appreciate it. Makes the car a real drag to drive as is and it's a shame because other than this weird throttle problem the tune is outstanding.
AJ's still looking at it, but if there is no solution, I'll have to have the PCM flashed back to the CALID that worked, and go back to the Predator.
Here's video of the problem from another person experiencing the same issue.
http://www.youtube.com/watch?feature=pl ... zjwMCbswdk
