Thank you for your reply, I think I am using L8 as the car was made in 1991.
Everything is aligned when I set the piston 1 in TDC. Still she make noize from time to time. Someday the almost doesn't and some other it is really pushing hard, it depends on the weather I think. Well I don't drive it but some start to test things.

The test I made previously where with a dead battery she didn't past last winter it seems, but with the new battery and the new leads the idle is smooth. Some variations up mostly but as the starter is on I don't really think it is an issue. Only accelerating make the car running on 3 cylinders.

I noticed that my alternator might be faulty also 12.08V when the car is running. The battery is new and ok. This week-end I will redo the alternator cable that is not in great shape and then check if I need to replace it all or just the regulator on it.
I am checking every connector and clean them even if I don't see anything because the injector have barrely 10V at their connector so it might be a cause.
During the voltage check, the 2 first injector that receive ~10V could be unplug (one by one) almost without variation of the idle but has soon as I was unplugging the 3 or 4 the engine start to graze and then shutdown. I only had the time to seen a poorly 9.70V at best.