Hey so I have a 2003 350z with smoke coming from the exhaust and a strong fuel smell with a P0181 and P0182 and a P0037 and a P0031 code For the bank 1 sensor 1 o2 sensor , However I changed the b1s1 and the code stayed for whatever reason even after driving it around it and clearing the codes it did not go away then I changed the b1s1 and it didn’t go away then the bank 1 sensor 2 code popped up afterwards. I got brand new valve covers changed the valve cover gaskets and plenum gaskets as well as my spark plugs and coil packs and all my issues still remain however I have not changed the fuel injectors, then I took it to a mechanic and he says the problem is my ecm but I feel like that makes no sense what do you guys think?
Something I forgot to mention after I changed my gaskets and spark plugs and coil packs and such the smoke and smell got worse.