Hi there
i recently did a really stupid act i changed my cone filter and had the maf upside down so when i turned the maf back round it was faulty so i bought a new one
today i installed the new maf sensor and the car seemed to be back to normal but ten minutes into my drive i got a bad misfire juddering like the engine was chocking i took it to a garage and got the ecu fault codes which where

p0171 system too lean bank 1

po301 cylnder 1 misfire
po302 cylinder 2 misfre
303 misfire
304 misfire

im really worried now all i wanna do is get her better its gettng me down now any body up on this sort of stuff i wondering if it could just be plugs or
a 02 sensor?????

 

https://www.scoobynet.com/general-te...2-sensors.html

 

Get rid of the cone filter for starters.