Engine Noise in Cold weather - Ford Powerstroke Diesel Forum
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Old 12-08-2013, 04:11 PM
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Engine Noise in Cold weather

I am experiencing a weird noise that sounds like back pressure when temperatures are below approximately 45 degrees. No problem starting, but as I begin to drive and speeds reach approximately 20-25 MPH there is a noise consistent with and air type of leak coming from under the hood.

The noise as speed increases ceases, but will return as speed is reduced. There is also a strong odor of exhaust/diesel fuel smell associated with the noise.

It sounds almost like a jake brake being applied. Again, I only experience this during temperatures below 45 degrees and the noise is coming from the engine compartment.

Not sure if anyone else might have experienced this problem. Any help is appreciated.

Last edited by Catahoula1982; 12-08-2013 at 04:21 PM.
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Old 12-08-2013, 04:18 PM
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Sounds like your EBPV opening and closing. It's normal in cold weather, although I unplugged mine because it would only kick in when driving, and the truck would fall on its face as a result. A high idle tune did more for motor warm up than the EBPV ever did.

Last edited by nine6stroker; 12-08-2013 at 04:21 PM.
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Old 12-08-2013, 04:28 PM
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Where might I locate the EBPV plug? Just frustrated with the way it is running and when I first encountered the problem, I thought the engine was going to die. It ran very sluggish and would not respond well at all.
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Old 12-08-2013, 04:33 PM
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The plug for mine was located right between the driver's side of the turbo y-pipe and the intake side of the turbo.

And yeah, it's pretty much a butterfly valve that blocks a majority of the exhaust flow off of the turbo to create a load on the motor to help warm it up.
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Old 12-08-2013, 04:35 PM
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This is normal... ain't it? Mine has always done this. isn't being cold natured a diesel thing? Sure was with Army trucks... I just let her warm up for 10 min or so in weather like this, then she's strong as hell. Gonna have to get a tune module one of these days.
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Old 12-08-2013, 04:39 PM
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I don't know if they're supposed to engage when you're driving or not, but it irritated me to no end, so I unplugged it, and no more problems! lol
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Old 12-08-2013, 04:44 PM
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I let my truck warm up a minimum of 15-20 minutes, but still encounter the problem. I will look for the EBPV plug and try that.

Thanks for the help guys, just wanted to make sure I was not damaging something by driving it.
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