Turbo "Whoosing"

[MDRhoads360587]

I bought this truck back in August and have had a Whoosing sound coming from the turbo/exhaust. When it's warm out it does it upon start up and then that's it. It sounds like a popoff valve or vacuum leak then you can hear it "seat". Well this morning it was 32 degrees here when I started it and it didn't do it on start up. I let it warm up about 20 min before I left for work. When I would accelerate I could hear the " Whoosing" and then "seating" up til around 1200 rmp and it was very sluggish. When it seated I noticed the power come back. As soon as I would let off and accelerate again, it would do it again. After I drove it about 5 miles it quit doin it all together. Any ideas what it might be?

[ol_Blue97]

This is your exhaust back pressure valve closing... the computer is closing it to help warm the engine up faster, altho i dont know how well it works. If it annoys u just disconnect it on your turbo pedistal and make sure the vale is open and wire it open for insurance, or leave it alone and run it as it is

[MDRhoads360587]

Should it be doin it while I am trying to drive, causing it to run crappy? Would changing it help or is that just normal?

[erics diesel]

It will do it until the pcm thinks the engine is warm enough. Most of us just disconnect it

[MDRhoads360587]

So just disconnect and wire it open? It won't throw any codes or make lights come on?

[7.3550Duty]

Once you unplug it, it will always be open. And no you wont throw any codes once you unplug it. Had mine unplugged for at least 4 yrs now. No need for it

[erics diesel]

It will throw a soft code but the light will not cone on but if you hook it up to a scanner it may show the code for it

[MDRhoads360587]

Alright. Thank you guys for the information. Much appreciated!!

[backwoodsboy]

Plus is underneath the turbo, accessible from the drivers side of the vehicle. Should be hard to miss.

[Bocephus_3349]

You are not letting the truck warm up for 20 minutes are you? A couple of minutes is plenty. Just ease into the throttle until the needle comes up.