When I had this opposite issue (too right on e85 at start), I used the open loop gas/alcohol idle/park and IVT open loop tables to change cold start...
A bit of a dead thread but has anyone found the source of this? Im on a 13 5.7 Challenger with an on3 TT setup...same thing. 2500 fueling momentarily...
After having HP tuners Vcm scanner connected to the computer I noticed I lost comms with the ECU. Now all the warning lights, including gas light etc...