Here's some graphs, hope it makes sense..
RPM - lambda 1 & 2 - fuel trim - O2 loop (open/closed)
Cold start, waited for idle to settle and then revved couple of times.
RPM - fuel trim
Detailed view from above graph.
I have equipments to measure 1st lambda from connector, hope I have time to do that maybe tomorrow.
About lambda connection: new lambda is Delphi make, it had this kind of connectors on all four wires
[link].
I cut old lambdas wires near its connector and attached this old lambda connector to new lambda, color to color. There was two whites, one brown and one black (if I remember right).
I don't notice anything abnormal when idling or revving the engine, no shaking or misfire-kind feelings. Idle consumption stays at 1,1 - 1,2 l/h (AC off), average cons. about 8,5-9,5 l/100km. Usual cold start idle consumption starts from 5 l/h and may take couple of minutes to drop to normal level. Gasoline does not smell out of exhaust gasses when hot engine, only at cold starts but not very noticeable.
Exhaust flex pipe replaced one year ago, also whole pipe from cats back. I haven't check condition of exhaust manifold, will do that tomorrow.
There is one thing that has troubled me for awhile: You can see from above graph that there is that period of time from cold start that idle is high and is settling down. Sometimes that idle is even higher than shown in graph (even up to 3000 rpm), and if I rev up the engine or start driving, revs can get "stuck" up, lets say if I rev up to 2500 rpm and release acc pedal, revs stay 2500 until drops after 10-20 seconds.