[Smallblock454]

Hi,

well first for DME 7.8:

P1128:
360 Oxygen Sensing Adaptation, Idle Range, Bank 1 - Below Limit, 360 Oxygen Sensing Adaptation, Idle Range, Bank 1 - Above Limit

P1130:
361 Oxygen Sensing Adaptation, Idle Range, Bank 2 - Below Limit, 361 Oxygen Sensing Adaptation, Idle Range, Bank 2 - Above Limit

360 Oxygen sensing adaptation idle range, bank 1
361 Oxygen sensing adaptation idle range, bank 2

Means the problem is reported at idle - so to say at very low revs.

Do you have a modified exhaust system? Did you check if your exhaust system has no little leak - especially manifold and monifold bearings?
Where both lambdas replaced, or only one?

Regards
Markus