Compression Ignition Addict
Join Date: Jul 2007
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Whining noise in exhaust
I've been trying to track down an annoying whine/drone coming from the rear of my truck. I thought it was the diff, but I just figured out that it's coming from the exhaust and is almost certainly originating in the turbo. I can hear it at speeds anywhere from a crawl to about 45 MPH. It's not turbo whistle. It's a much lower frequency resonating drone that happens when the turbo is spooling up and down. It's loudest when under load but still does it a little when in park.
I tried power braking, and it does it just as loud as when you're driving, so it's definitely not something in the driveline that only makes noise when you're moving.
Does anybody else's truck do this? It's getting louder, so I'm thinking the turbo bearings must be going.
Also, my fuel economy seems to be getting worse. I know it will get worse on winter grade fuel, but they've been selling that here for at lease a few weeks, and my economy seems to get worse almost every day.
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2006 F-250 Powerstroke Crew Cab Lariat Long Bed 4x4 FX4
SCT Xcal2 with Xtreme tunes by Innovative
Banks Monster Exhaust/Quadzilla Commander
ARP Head Studs and Elite Sneaky Pipe (Thanks Scuffy)