Lately my 5.4 has started to roar at around 2000rpm. Maybe roar isn't the best description it soulds more like the soud you used to get when you opened up a big 4-bbl carb. It didn't used to do this though. Any ideas?

 

have you changed anything with the intake?

 

running a K&N in the intake, it was serviced about 4000 miles ago. Thanks, for asking it might need serviced again, i'll check it.

 

i wouldnt say that has anything to do with being serviced or not, but maybe your just hearing the intake. i woulndt think only a k&n would bring out this noise that much. does it do it at crusin speeds? or jsut when you punch it?

 

A bad clutch fan will produce a roar sound.

 

does it at a steady 2000rpm. I can hear the same type of sound when I put my foot in it but at a steady speeed it is only at 2000

 

Chk the clutch fan ,by seeing if it will spin with a little resistance when engine is shut off.
If it moves with alot of force then its bad.

Rich