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You have a leaking hose in the intake tract. Check the big hose clamps for tight and look at the blue hoses for splits. You generate boost when you are on the throttle and what you are hearing is the boosted air. You should not hear this.
Dave
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2004 F-350. Standard Cab, 4X4, 6.0 with Torqshift, 3.73 w/LS. <font color="red">(((XM))) Satellite Radio.</font> Lo Jack, 6608 lbs wet. Born on 8/4/2003. Engine 07/23/2003. 3" Lift. Grover Air Horns!!!
http://community.webshots.com/album/85108545NlXNsD
1993 F-350 4X4 7.3 IDI with 5 spd. Gone now.
1976 Kenworth C-500 with Detroit Diesel 8V92TA with 3 spd Jake, SQHD's and RTO 12513 10 Wheel Dump Truck. Sold.
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