Originally Posted by Gugs
The answer is-
Your overboosting or knocking.
With the newer firmwares we have new features...
The Jb4 goes into safety mode and forces itself into map 4 until you restart the car.
look for flashing check engine lights right before it happens, 1 flash is overboost and several is knock.
This is exactly what is happening-
as its defaulting to map 4 and leaving you to OEM map/boost levels.
Put in less e85 and it will most likely help the issue.
Spot on...seen it before with my buddies car...
JB4 G5 ISO+BMS flash,Walbro 455 LPFP, DO meth kit 4-AN SS lines, BMS OCC, RB turbos W/3.5 N20 sensor, RB valve, BMS DCI, 3" AR kittyless Dps, Strett 2 oil OC W/ SS lines, ER FMIC, ER CP W/HKS BOV, M3 control arms, M3 Strut Brace, M3 front sway-bar, Meyle HD tie-rods, HPA rear toe arms, Wavetrac LSD, DEFIV differential kit, BC Coil-overs, Power-Flex subframe bushings, stoptech slotted rotors, Rogue Tranny Mounts, Concept 1 CS-5.0 rims,