320i misfires cyl 2 and Drinks fuel need URGENT HELP!

[Karimkix]

Hello, I recently bought an E90 320i (N46B20), but I'm experiencing a problem. My car starts misfiring on cylinder 2 after driving for about 15 minutes. The misfire doesn't always happen but occurs most of the time. The car has a crackle tune. it also catalytic converters are empty.

I've already replaced several components, including:

Fuel pump and filter

Fuel injectors

Spark plugs

Ignition coils


Despite these replacements, the issue persists. A diagnostic scan revealed the following:

Errors related to all four oxygen sensors

Misfires on cylinder 2 (and occasionally on cylinder 1)

MAP sensor (though I don’t believe this is the cause of the problem)


Additionally, the car is consumes a lot of fuel, reaching as high as 18 liters/100 km (or 13 miles per US gallon).

[Karimkix]

Bump