Beemer71

Hoping anyone can help. I have a 95 325i coupe, cars been running great, a few weeks ago I parked the car then 2 days later when I needed it it wouldnt start, cleaned all the plugs, connectors etc, still no luck. Then I had a mechanic come out and he told me the airflow meter was bust, so I bought a 2nd hand unit but still the same problem, it runs but it sounds like its backfiring in the airbox, and like its running on 3 cylinders. This is driving me crazy!!!!!!! Please help!!!!!!!