i got a problem with my 1jz at around 4k it just sputters and breaks up right when it goes to built boost
heres what i have done so far
new coil packs
new spark plugs
new coil pack connectors
replace one of the two cam sensor pins that were no good
checked inside ecu for burnt capacitors
took out plugs and cleaned them they were gaped at .30 i put the to .28

and i am getting code 12 which correct me if i am wrong is either rshared_pm signal or knock sensor

and about the ecu is a HKS ecu

the car wont rev past 4-4500k rshared_pm at idle and under load when driving

does any body have any suggestions that can help me out it would be greatly appreciated thank you