Need help with p0130, poor idle

[p1c]

Hi everyone , I'm having a weird issue that I can't figure out. So I'm turning to you guys for advice.

I bough an 01 a4 turbo Quattro.

Looks like previous owner did all kinds of weird stuff to it

Info:

Car had 30lb Injectors and a split second boost controller. On a stock computer. Car was running like carp. Went back to stock injectors and got rid of the split second box . Car drives decent now. But I do have a p0130 code (malfunction with primary o2)

So far I have:
Tried 3 other o2s from working cars
Tried 2 mafs
Rewired the 02 all the way to ecu
Boost leak test. No leaks all check valves working

I have vcds but the pc is at the shop now getting a new screen .

My generic scanner shows 0v during open loop of course , but when,it switches to closed loop the voltage starts to drop and stays at -1.4 v and car starts to shake.. anyone had similar issues? Any suggestions?

[Davdraco1]

I had the same code, put a new one in, car runs great. Then a few days later i got this code again so i just cleared it. It hasn't come back in over a week now. My car idles normally but once in a while the rpms dip to 500 then back up to 800. Then it idles fine. But I can tell when the code comes back on bc ill start getting an unusual amount of smoke out of the tail pipe, I have a test pipe so its worse then normal. Does your car idle normally or is it rough?

[p1c]

I tried my friends ecu and I checked with the scanner and the voltage is a bit more steady. Stays around 0 and climbs as I accelerate. As far as idle it's rough for about a minute but as soon as the code sets seems to idle better as if it's running of a predefined map... just order another ecu hopefully that fixes my issue. I'll report back soon

[SanBluB51.8T]

I am having the exact same problem as davdraco1 its driving me nutts I made a thread byt didn't get many replies.....