So my turbo had quite a bit of shaft play and was burning some oil. so i got another CT26 from a buddy swapped it on along with the o2 sensor now i have major problems, when idling the car revs from 500-1000rpm and occasionally stalls out. also when slowing down in gear it blows smoke from the exhaust, it seems to be burning oil and gas as the smoke isn't totally blue and smells like a snowmobile. car shows no codes, we changed back to the old o2 sensor that we knew worked and same problem..any suggestions?