My mother has a 1997 Expedition XLT 4x4 with the V8 4.6L engine. and she
says it gets kind of loud going up hill or when there is a pull on the
engine. i asked her to elaborate and she says it gets loud from the engine
not from the exhaust. i was confused so i drove it for a little while and
going up hill it does get rather loud, like the intake is having a hard time
pulling in air. this isnt an exhuast sound. its defintly under the hood.
Anyone have an idea?