Ah. It sounds to me like he's saying that the Bank 1 MAF is measuring air going to Bank 2 cylinders, so a bad B1 MAF would lead to an improper mixture (and corresponding O2 readings) in B2 cylinders. I'm not sure if that is true or not (or how it would affect your engine), but jchammond is pretty reliable.
Unless you have run terribly rich in the past, spark plugs shouldn't be a problem at 45k miles. I'd check a few of them before deciding to replace.
|