In open loop i have the afr 14.5-15.2 but if i put the car in closed loop the stft will go to 25 and the car will die from running too rich. WTF? And the ltft wont adjust. Is the o2 sensor bad?

 

have you tried logging airflow at idle? then cross reference the Hz reading with LTFT control table in your ROM. It'll let you know if you're pulling in too much during idle to trigger the low LTFT.

If you haven't enabled LTFT control, do a search for it, you should find a thread on it. I did this recently.

 

Idle is 43hz.

 

Have you recently installed injectors or had a new tune done?

 

i installed the injectors a couple months back tuned them in but wanted to make sure the trims didnt swing any as i had a couple small boost leaks which i just fixed. The car runs fine in open loop which i run all the time. It just is running lean in a couple areas so before i touched the maf scalings or fuel maps i wanted to make sure the injectors where still within 5%.

 

you can try adding that LTFT controll definition to your ROM xml and see if you within the values.

 

make sure your rear o2 isnt disabled by perifindary bits