lt1 tune

[blownSS]

so i go to get my car dyno tunned and at first it blows white smoke like crazzy. then they get the injectors right and no more smoke. but now bank 1 o2 is at -24% and bank 2 is at 4 so i cant get the car tunned cus the tunner guy doesnt know what side to trust. he either leans out the car or makes it run very rich. what can make the o2 sensors act up or are they going bad. i really want to get my car tunned but i dont know where to start looking to see whats wrong. the car is a 383 with a d1 blower

[MoeHorsePower]

The PCM is not reading the O2's at WOT, If this is at idle then you probably have and intake or exhaust leak prior to the 02 somewhere...

[blownSS]

yeah its at idle. whe u get it up to like 3000 they sort of level out. so i should make sure the headers aint leaking, and if they r good the manifold aint sitting right. or are they any other things i should check. thanks for the help.

[MoeHorsePower]

yeah its at idle. whe u get it up to like 3000 they sort of level out. so i should make sure the headers aint leaking, and if they r good the manifold aint sitting right. or are they any other things i should check. thanks for the help.

Just check those area's, use some carb cleaner or something similar and spray around the intake, if the RPM's goes up, then you found it..