sounds like i may have a problem that is not all that uncommon
i have a 94 honda accord with 100k miles, runs great, handles great
just last week i noticed a resonant humming / growling sound coming from the engine - it’s very “vocal”
it only occurs around 2000 rpm, and is more pronounced when decelerating
there’s no apparent loss of power or fuel efficiency
the sound occurs with or without the transmission engaged and seems to be worse after the car has heated up a bit
cat converter? intake manifold?
any thoughts or direction would be great!