weird knocking noise :(

[future]

hey, my car has developed a really odd knocking noise, it only happens on partial throttle holding speed around 40mphish in 4th, 5th, or 6th. Its difficult to describe but is not a metalic sounds, almost like something loose flapping around. I have had a look and cant find anything loose was just wondering if anyone has had this problem or knows what it might be?

thank you
tom

 

[S3 TAM]

Where is the sound coming from.
Back/front
Left/right

does it happen when going over bumps?

 

[future]

sorry forgot to say, no change over bumpy roads. its from the front sounds middleish engine area probably slightly to the right (driver side)

cheers
tom

 

[s3dave]

Loose lower engine cover?

 

[future]

now thats something i didnt even think to check :/ got a bit caught up with it being throttle position sensitive...thanks for the help dave.

tom