Compression Ignition Addict
Join Date: Mar 2008
Location: Santa Rosa, CA
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It sounds like an exhaust leak to me!
If your up-pipes from the exhaust manifolds have even the slightest leak at any of the connections it will make a high pitched squeal and is hard to pinpoint because of the engine noise.
2005 F-250 CC/SB 4x4 medium wedgewood blue
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5" lift, 5" Donahoe rear springs, 35x13.50 MTZ's, 18x12 Fuel Hostage wheels, 4.30 gears, Banks 4" exhaust, Airraid intake, SCT from Innovative, ARP headstuds, Bulletproof ficm, Scangauge II, Randy Ellis Design lightbar, Street Scene flares, Harpoon mod, Zoodad mod, LED 2010 taillights, Switchback LED front turn signals