I removed the headers, found a hairline crack in one of the mouting locations, and replaced the drivers side header gasket with the one provided by the header company and I swapped the coilpacks but that did nothing.. The car runs fine in open loop (first 2 minutes of startup) but goes to crap after it goes into the closed loop...
Also check the fuel injector wiring harness at the back of the motor.It comes up behind the intake manifold and the harness eventually rubs thru,iv'e seen this happen a few times now.
Whats the verdict man,i'm curious to see if your harness is rubbing like alot that throw this code for no apparent reason,it affects the voltage to the injectors.