Fiat Coupe help

[bonnie]

Hi, problem with Coupe 20v turbo 1998,
Rough idle, rough running holding rpm at cruise (2500rpm) running as if there is an air leak ie. lean.
Fault code: lambda reached maximum stop
On gas analyser on idle and cruise reading as follows: CO 0.9
HC 180 ppm
O2 0.8
Lambda 0.97
Lambda indicates a rich mixture but engine runs as if drawing in air. New air flow sensor, lambda sensor, manifold intake tubes replaced, fuel pressure/delivery checked, no fault found with breather etc, injector spray pattern checked, live data readings appear to be okay. All emission readings above 3000rpm perfect.

Starting to think it could be wiring, earths or internal ecu fault

Any help would be appreciated, thanks

[Waltomatic]

Hello

I need the injection parameters for thie engine.

TKS