2011 Chrys 300c (5.7l) - Car randomly looses power under acc

[NCTAR229]

Figured I would kick this to the community here.

As it stands now, ive restored my car back to stock tune, which sucks. Hoping I can find a solution...


When running the i100dcx diablo tune (93), increased shift firmness, or stock firm, speedo limiter edit, and 15% throttle boost, I have experienced loss of acceleration. (Only settings changed)

It happens randomly, and usually under medium accel, to WOT.

To use one occurance.. I had just made a turn onto an on ramp, I started to moderately accelerate (my foot was not in it, but i was holding gear firmly to quickly match speed with the interstate traffic), at about 74mph the car suddenly just stopped accelerating. Modulating the throttle will not change my speed unless I put it to the floor, or let off completely.

The very first time it did this, I decided to take shift firmness off and Reset TCM on diablo tune adjustable parameters. It still occured again. This has occured about 6 times now.

About two weeks ago, I spoke with tech support via phone. They were friendly, and suggested I raise my rev limiter by about 400. I did so the next morning, and the issue happened again at about 65-70mph during hard acceleration (not WOT) while passing someone left of center line on a two lane road. It freaked me out bad enough that I pulled over, and immediately restored my vehicle back to factory. Im not about not feeling complete in control of my machine.

The issue does not present itself on stock. I have tried to force the issue on stock, I have autosticked, done all manner of acceleration.... No issues, two weeks now.

Any solutions or ideas would be welcomed. I love my diablo tuner. For the money, it feels worth it when its jiving with my car.

Abit of info:

2011 Chrysler 300c 5.7l
64k mi
Second Owner
Tranny and Diff flushed at 58k at CJD Dealer
Cold Air Intake
Utilizing 93oct with Diablo Tune.
Tuner has been updated to latest.
No other mods such as engine or exhaust




Apologize for any typos or weird formatting.. Typing this on a phone.



Thanks in advance for your help!


- nctar

[mikel]

what codes do you get when this happens?

Thanks

[NCTAR229]

Hey Mike.

I get none brother.
No evic, or cluster. I also checked dtc from the tuner and no codes.

[NCTAR229]

Hey Mike

Didnt expect a quick answer due to being close to the holidays and all, but was anyone down there able to put heads together on this yet?

Let me know if you need anything else from me.

Im available on cell or email as well, let me know would be happy to PM them.


Thanks

-nc

[mikel]

can you tell me exactly when this happens?
Are you sure its not at peak rpm before the shift point?

[NCTAR229]

Its not before shift.

Happening around 3 to 4k under moderate throttle, from a non traveling speed (ie: matching from 30mph on a ramp to interstate speeds)

Light acceleration doesnt cause the issue, nor does WOT.


Ive been on stock since Dec 17th, no issues as of yet.

Lemme know if you need anything from me.

Thanks!

[mikel]

Ive simply never heard of an issue like this, so I am not sure what to suggest.
Have you looked on LXforums to see if anyone has run into a similar issue?

[NCTAR229]

Im familiar with the forum.. Ill see what that turns up.

Im going to load the basic tune back on ( no throttle boost, add speedo edit) and run in that way in the mean time... Seeing as the issue presents itself with the 93oct tune with the above features... And see if i can start a process of elimination. Ill keep adding features incrimentally untill the issue presents itself again.

Theres also a shop in Raleigh that i believe works and tunes with your products.. Ill hit them up as well.


Ill keep an eye here incase ya'll come through with anything.. And will post if i breakthrough with something.

[Burner71]

I've had this same issue on a 2012 Ram 2500.
I think it has something to do with the throttle boost. I usually run 5%. I was using the 87 Octane tune and 10% boost when it happened. I was accelerating and then it was almost like it went into neutral. I picked my foot up off the pedal and waited a second then gave it gas and it was fine. It happened 2 times. No codes or anything came up.

[Smokey613]

I had this exact same issue on my 2011 300C 5.7L also. This was 2 years ago running the DS 93 Octane tune. It happened 3 different times just as described by the OP. I switched to a custom HemiFever tune then later to a Johan tune and never experienced another occurrence of this phenomenon.