2010 Dodge SRT8 - Engine Dies When Rolling To A Stop

[lloyd_david]

Recently (late 8/2011) I had installed a Kenne Bell 2.8 LC supercharger, small blower cam, 180 T-Stat, an upgraded auto trans valve body, with a DiabloSport Performance (Custom) Tune package by an experienced/qualified DS tech/retailer. I have a DS Predator U7135 w/ the r29 update and am burning 91 Octane Shell Premium gasoline (highest octane rating we can get here).

Several issues to inquire about:

1. On hot days (over 100 degrees), after exiting highway off-ramp and rolling to a stop, engine dies; does not hold idle. I can watch the RPMs actually take a straight-line dump down to zero.

2. At other times, though, for whatever reason or through whatever programing, engine will attempt to recover at around the 500 RPM range as though someone is quickly pushing on the accelerator which causes the engine/trans (auto) to jump dramatically.

3. While trying to correct the above problems, as well as "tune" around a rough idle problem (surging/jerking at low speeds and/or while stopped at a signal) the Tech/Retailer said the A/F "Charger" template on his master DS tune program was corrupt and tried to correct by importing the corresponding "Challenger" template as a quick fix:

3.a. template "import" worked for a short time on the stalling problem during cooler weather but, with the current hot weather here in SoCal (this is when I seem to have this "stalling"issue, so I must believe there is a direct connection), I am back to having the identical problem again; and

3.b. the idle/surging issues remain (this is a constant).

Can anyone provide me any information on what might be going on or what I need to do to resolve these issues? I would like to continue the discussion off-line with a DS Moderator if that is a possibility.

Thank you for your consideration and any replies that may come my way.

SRT109
So. California

[Mike_Levy]

Theres an air leak. I can tell you that with 99% certainty. Been there. Theres a gasket thats not sealing.

If you want to discuss offline, call Tech Support during normal business hours.

[pmf1]

Agreed. The intake gaskets on those are known for leaking if not placed perfectly.