I have a 08 Passat 4cyl 2t. 117k miles. I changed the spark plugs and coils, recent oil change. My CEL is on. P0171 system too lean. When I try to floor it (like entering highway) I get a little jerks I usually have to gradually speed up and not floor so I won’t have that jerky feeling. I feel like it’s the MAF sensor of some sort. (I’m not a car genius) any help will be helpful.