I have a 2014 Nissan versa note SV it has 139,000 miles on it and when you step on the gas it won’t drive so fast all the time sometimes it’s good and sometimes not it seems like you’re struggling to get air what do y’all think it could be but I’m thinking transmission fluid but then I had a friend that works on cars look at it and he said the computer needs re-program which I don’t know