exhaust sound after startup - Ford Powerstroke Diesel Forum
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Old 07-12-2012, 11:47 AM
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exhaust sound after startup

A few seconds after I fire the engine up, there is a weird change in the exhaust sound for a few seconds. Almost like a valve is opening or something and then closes again?? I'll try to take a video if I can...I'm trying to figure out how to describe the sound...
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Old 07-12-2012, 11:59 AM
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I think what you are hearing is the vanes cycling in the turbocharger?
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Old 07-12-2012, 12:50 PM
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Ha Ha Ha - I am laughing with you and not at you.

I had the same thought on day one with the truck. It is the VVT.
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Old 07-12-2012, 01:05 PM
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Thanks...it's just weird I hadn't noticed it before.
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