5.3 4L60e swapped Cadillac-Rich on Bank 2

[capriceutah]

Hello,

I have had hp tuners for a while but havent messed with it much.
I have a friend that just purchased a previously swapped cadillac

The thing is running super rich on bank two . The Bank Two LT is pinned at 25%

We tried swapping the o2 sensors from one side to the other and the condition doesn't change
The car is also throwing a p1154

The other problem is that the pro tuner has locked the tune I believe . I'm recieving the x7F negative response error when I try to read the tune.
The harness appears to be manufactured by the same company as the tuner
As far as I'm aware this is a GENIII 5.3 that is stock(Running an ls1 intake) with a stock 4L60E.

Any ideas on my next steps or anything I could try?
I have attached the datlog
Thanks for all of your help in advance! ,
Chris

[5FDP]

+25 is lean, not rich.

Check fuel pressure and for vacuum leaks on that side. If it wasn't tuned right for the intake swap that is for sure an issue. Make sure fuel pressure is 58psi.

A locked tune will still let you read it. The error you get sounds like a wiring issue.

[capriceutah]

+25 is lean, not rich.

Check fuel pressure and for vacuum leaks on that side. If it wasn't tuned right for the intake swap that is for sure an issue. Make sure fuel pressure is 58psi.

A locked tune will still let you read it. The error you get sounds like a wiring issue.

Awesome!

Thanks for the response!

I will have him check fuel pressure!

We will look at the wiring too

[capriceutah]

Bump on this post.
I built a stand alone to read the ecu.
We cleaned up some of the grounds
I was able to read the ecu in the car after that
Fuel pressure is 58 psi

Car has 42 lbs injectors but it is tuned for that..It Also has a dorman ls6 intake and long tubes.

[rhighfil82]

Might also log Misfires on all 8 cylinders.. That could help determine if any injectors are leaking, plug is fouled, or if there is a vacuum leak on that side.