The electrical connections in my car are a disaster and redoing them solved many problems i was having.
Only, I sort of lost concentration there for a moment while redoing the ECU plug connections and misplaced a couple that i think have to do with the Air flow meter, since the car acts the same with the Air flow meter connected and disconnected.
Since this, the turbo's boost is unstable and my car doesn't drive well

I wish i had another C3 hdi to compare the wiring with.
All c3 models are the same wiring, so 1.6 1.4 8v 16v all are good
Autodata's diagrams and other diagrams don't seem to cover the connections color and order.