Yea, I can hear it there. I think it sounds like lifter tick but you said it doesn't vary with RPM so that can't be it.

 

and i think if are the lifters, the sound should be always audible, not just in motion and acceleration....here is always the same frequency, sometimes more loud some a little less, but always same frequency...it sounds like a spark dispersion, like when you test a spark plug on the frame of a bike

 

If it was spark, it would vary on RPM.
Based on your description, it basically has to be something banging on something? Anything in the engine rotation, trans, axles, tires, etc would all vary based on speed and/or RPM.

 

I really don't know, don't sound mechanical. Sunday i will lift the car and check again everything under, i will also control all the engine groundings (One user had same problem, but without the sound) i will also buy a new laptop, old one with Evoscan Is kaputt, maybe the standard OBD2 can't see the fault codes, i will try to log injectors and other things, maybe i can record something usefull...

 

my guess...VC baffle falling apart just throwing it out there

 

Maybe? Could be hanging on and rattling against the VC based on crankcase pressure....idk, its weird that it maintains the same frequency no matter the RPM/speed.

 

I Will try to check on rivets, maybe i can find something loose, next step if i can't find anything, i remove the VC and check the inside

 

Little update, i performed a resistance check on the ignition coils...manuale Say between 8.5 and 11.4 kOhm
Mine are 12.8 and 10.4...the highest had a lot of "oxidation" (more like sulfur powder), on the connector of the secondary plug...i cleaned everything, also the springs inside the plugs...now i go test it

 

Another inconclusional update
-cleaning the coils had no effect....problem persist

Now i have a doubt, can be the fuel pump? Seems legit
Take a lot of time cranking before turning on, after a small drive today the idle Is jumping from 1100 to 750 RPM...ticking sound can be the injectors that can't have enough fuel and go "dry" Afr Is now leaner in idle
But...i need help with this
Fuel pressure from the rail with vacuum connected is 39psi stabile in idle , and 56psi at 20 psi turbo...are those value correct? From what i found seems pretty good

 

If you are having injector issues it would be variant on engine speed, become significantly more pronounced under high rpm and load, and you would be playing roulette with your engine if you think there are starvation issues.

If it isn’t dependent on speed- either engine or vehicle - rule out any part that is supposed to move or makes anything move and work from the top down or bottom up.

You are doing good work tidying things up as you go but it is something purely physical if it does not make the noise faster at a higher engine speed or vehicle speed

 

Thanks for the consideration, the only doubt i have Is, why i have flashing CEL right after the sound came out...exhsaust and intake are good and sealed, i changed all the exaust gaskets, from turbo to terminal, intake i did a pressure test and Is good and stabile at 30 psi...oil pressure Is good all the range, fuel pressure Is good all the range, compression test Is good...next step Is asking the neighbour to drive my car and i fit in the engine bay trying to locate this ****ing sound🤣, i hope today or tomorrow will came back my laptop and i can finally do a complete Scan, because with standard OBD2 i have no codes stored and can't log most of the parameters

 

The flashing cell is just a knock sensor seeing noise. This can 100% be caused by physical parts banging around, I had that issue with my downpipe once.

As pledgekincaid said, if it doesn't vary on RPM or MPH, you can eliminate everything that is supposed to be moving or spinning leaving only stuff banging around that isn't supposed to.

 

I think the only option right now Is to hop in engine bay while someone else driving and try to locate this way...because looking and testing the engine bay everything seemsin order...i'll keep everybody updated...thanks

 

***UPDATE***
Did some logs with Evoscan, knock sensor Is going Crazy with peaks of 25 knock but everything between 2800 and 3200 RPM, no correlation with Load, no knock over or under this range...no codes stored.
i can't hear the sound over this range of RPM, and no knock, so i assume It goes away after 3200 RPM

Car keep up with difficult start up when hot
And some random power loss when cruising

Fuel pump Is good, fuel pressure regulator Is good
Still can't figure out where the noise came from
From inside the car seems behind the dash

The sound appears just when i press on the accelerator, also Downhill, without load...i slightly press the pedal (even a couple of degres) and the noise start, also with 0 load, negative or positive turbo pressure, all gears, all speeds...the only things there are constant are the pedal activated, the rpm range and oil temperature over 140°F
(If i go Downhill, no gas at 3000rpm there Is no noise, as soon as i touch the pedal, noise start and goes away if i lift)

 

Have you inspected your clutch assembly?
does the engine still has the balance shafts?