yah sorry the n75.

So after half a year+ its time to update this and (hopefully) keep it updated for history if somebody wants to do the same Got the B4 fixed up and running as backup car so that means I can finally have the downtime needed with the project car   after years of dailying every single day.


So the reason for the long delay is that the wiring harness on these cars/ecus is just a tiny bit more work than just converting the o2 to wideband, simply didnt have the time for the downtime for them and the other required harness changes.

The atmospheric me7.5 runs on wasted spark coil, this means you dont have the other 2 signal wires coming from the ECU for the single COP's on turbo cars,so you gotta add them like the wideband wires.
Pins that you need add are : 94 and 95. The other two, 102 and 103 you can reuse from original harness, aswell as the power which comes from ECU relay and ground too coupled on all coils.

The other thing is the MAP sensor, the wiring for this simply does not exist. You are required to add the signal wire to pin 101, voltage is shared between hall sensor pin 1 and they both go to ecu pin 98, ground is ground.

N75 wiring poses no issues because the factory harness uses these pins(output) as intake manifold switchover ( on many other atmo engines in VAG). Personally will require to switch to a new type connector for the tfsi n75.

And thats about it, wideband wiring has been detailed many times but there can be some differences in pinouts / pin numbering on some ecus, will mention them later on.

So most of the hardware stuff is done 99% so I could start actually calibrating stuff. I started with setting injectors up, deleting stuff that I dont have on the car, SAI, rear o2 etc..
Also a thing, due to space reasons the inital tuning will have to be done for alpha N, yes bear with me here, SD might come later on but I simply cant fit a maf reliably due to manifold / turbo location, block location and frontend location, I might not even be able to a fit a proper filter on... anyway.

So I copied the TB maps, WDK and MSN from the original non turbo bin/ original tb. What I noticed is that the car is running pig rich, get the logger out and see the load/msdk_w is mega high... So since I got the headlights removed atm, I fitted the MAF back on with copied scaling ofcourse.

With that I got pretty good AFR on idle/stfts, but when I check msdk_w vs maf, msdk is higher by about 2.5 times, this makes the can 'run' at like 9 AFR without the MAF unplugged ofcourse. Tried changing wdkugdn for now on idle and it does not change a thing both downwards and upwards(and why would it), also tried MSLG from non turbo bin, with basically no change.
edit: I'll log msndk_w tommorow to see if the correction happens with the msdk_w path or just simply the value is too high from before-wdk/ugdn path.
 Any thoughts? Log attached in zip because cant upload directly , 'too long to upload'.