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2016 Challenger Scat Pack A8 tip in bog on e85
Hi, I am trying to help my brother out with his Scat Pack A8.
Mods:
Ported IM/TB
Hell cat injectors
Catless mids
JLT CAI
E85
So he had the car remote tuned by somebody(forget the name) using a Diablo for straight E85. The car starts fine on it's own then stumbles and shuts off. 2-3 attemtps and it will finally hold idle. Next issue is if you give it any tip in throttle, the engine stumbles and dies. If you can get the rpm up to around 2k rpm, then it will rev and run fine. Fuel trims are +/-2%, so I don't think it's fueling. It seems airflow, timing, or torque related. I notice when I give it throttle the timing jerks negative then it stumbles. The tuner has provided several revisions and it still does the same thing. Fwiw it ran fine on 93 octane tune.
Thanks for any and all advice! I am fairly competent with GM gen 3/4/5 but Dodge looks to be a bit more complex.
Attachment 92451