I have a 1988 Delta 88. I changed the MAF because the car kept choking off. on 1990 Oldsmobile 88

Once I did that the car runs great. But now it seems as though I have no power and I smell brunt oil and the transmission seems to not want to change properly. What could cause these problems? Before changing the MAF everything was fine except the car was choking off

Asked by for the 1990 Oldsmobile 88
poss disturbed an oil line
I thank you for your reply and your time. But could you give me a little more detail? thanks again