I have a 5.3l with a 4l80e and 76mm turbo swapped into my buick regal. i have had major idle issues as when i start it it want to rev to the moon. right now my trans is bad and is always in gear so the only thing stopping it from reving to 3000rpm is the trans.
i just converted it to 2 bar os and it still dose it. funny thing is after checking another car with the key on and engine of my the map should read 98kpa, in order to offset it correctly i had to set the offset to 24 which is real high. and the linear to 200. when i believe it should be 200/10.33 offset.
i have tried another brand new map and i have the same problem.
now if i completely disconnect the map it will idle and rev normal. just really laggy. below is a list of spec and tune and log.
5.3l
4l80e
76mm turbo
e85 fuel
80lbs seimans deka injectors
bosch 044 fuel pumps
2 bAR MAP WITH 2 bar os
all wireing is new
pcm is questionable