Hey i have a 1995 850 wagon non turbo. Now i had a cel on. I replaced the o2 and started it up and ran great. Two mins Later the car started to chug and almost stall out. Then 5 mins later the car corrected the way it was running and runs fun until u turn it off and restart it. Then it does the whole thing over again. Im gettin code 5-1-2 and the o2 was universal. Once i unplug the o2 while it runs like crap it starts to run perfect! Now it sounds obvious its the o2 but i want to make sure because i dont want to spend 200 if i dont need to. Ive tried two different new universal o2s.Any ideas?

 

anyone??