well when i start the car right after it turns over for about 2 seconds it sounds like pebbles rattling in the exhaust up front somewhere .. also during normal driving im hearing a buzzing sound coming from the exhaust .. there is no ticking though like when you have a leak ... any way any ideas fellas ??? thanks : o)

 

post a sound clip...and the buzzing noise...is it coming from the rear??? if so may be the fuel pump[&:]