Can someone point me in the correct direction. My engine shows thru a DTC code that Bank 1 is at +25 and is running too lean however plugs show rich. Also, Bank 2 is intermittent to running +25. Have checked all leaks and cant seem to find any other than the ones I have found being a cracked pcv hose connector which I fixed..
6.0L 370 c.i / 4l80e 2800-3200 Stall
Longtubes full dual exhaust
Flat top pistons
243 stock heads
Tsp 228r cam 112 LSA
Deautshwerks 44lb injectors
Truck intake, factory TB, cold air intake.