e30 s52 running issue, PLEASE HELP !!!!

[AldcE30]

im finishing my e30 s52 swap and im having a major running issue. the s52 was swapped over to obd1 and i am using the treehouse racing connection harness, i wired it up and just about everything is operating correctly. the car starts up fine and will drive great for about 10 mins with no issues and no check engine light, after the 10 mins or so the check engine light goes on and the car runs like absolute garbage, it breaks up and barely revs "it feels like it isnt getting either gas or spark, the code the computer is throwing is the oxygen sensor which i just replaced and didnt fix the issue. once i clear the code, the car does the same thing, good for 10 mins and then back to terrible . any suggestions ? or has anyone had this issue ? please help ! i am completely stumped !!!!

[AldcE30]

i forgot to mention, the car has a trm tune with 21lb injectors, euro mass air, underdrive pulleys, headers and full exhaust, i bought the tune and injectors from a friend of mine out of the same swap whenhe went turbo. he had no issues with his car running this setup.

[328ijunkie]

O2 sensor wired properly?

[PuebloPete]

Does the car run like shit first then the check engine light? Or check engine light, then run like shit?

[AldcE30]

the check engine light comes on and then the car runs like shit, i may have fixit though i re grounded the computer, i didnt have much time to drive it but the light stayed off and the car ran good for about 20 mins

[thedean]

It runs like shit after 10 minutes because it goes to closed loop man... Disconnect the o2 and drive it around, tell me if it runs like shit after 10 minutes.

If it doesn't run like shit after 10 minutes it means the wiring to the o2 or the o2 itself is bad, this is because the car is remaining in open loop due to no o2.

When the car is in open loop it runs off the base maps of the car. Your circuitry or o2 is giving incorrect values to the ecu, causing it to run like shit by suppling incorrect fueling or spark timing.

Try driving the car around til it runs like shit. Then shut it off, disconnect the o2 sensor connector and start it. Tell me what happens.

[Mr.SWISS]

OBD2= Fuck that light, my shit runs awesome.