Air Leak
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Junior User
Joined: Mar 2007
Posts: 58
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From: Kalispell, MT
Air Leak
Hi everyone!
I'm new to the site and it's awsome! I have a 2001 F-350 4X4 diesel. When I start cold at night, I get a loud sound of rushing air. It goes away abruptly when I accellerate but comes back when the RPM stabilizes. It also seams to go away when the engine gets up to full temp. I do warm up the engine for 5-15 minutes before driving, but it does not make any difference in the noise. I am fairly certain that it is coming from the engine compartment. The noise does not change when I turn off the defroster so it is not a vacuume leak under the dash.
Any help would be appreciated
Scott Johnson
Kalispell, MT
I'm new to the site and it's awsome! I have a 2001 F-350 4X4 diesel. When I start cold at night, I get a loud sound of rushing air. It goes away abruptly when I accellerate but comes back when the RPM stabilizes. It also seams to go away when the engine gets up to full temp. I do warm up the engine for 5-15 minutes before driving, but it does not make any difference in the noise. I am fairly certain that it is coming from the engine compartment. The noise does not change when I turn off the defroster so it is not a vacuume leak under the dash.
Any help would be appreciated
Scott Johnson
Kalispell, MT
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Joined: Sep 2004
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From: Hamilton, MT
Originally Posted by MONTANA350
Jeff,
It's bone stock. I just don't remember it doing it last winter. BTW I was just in Hamilton two weeks ago...nice town!
Scott Johnson
Kalispell, MT
It's bone stock. I just don't remember it doing it last winter. BTW I was just in Hamilton two weeks ago...nice town!
Scott Johnson
Kalispell, MT
If you get a chance go check out the High plains chapter and join up.
Well Im not sure if the stock exhaust mask's the sound considering I had my truck in Pheonix AZ and thats were I had my exhaust put on, didnt notice the sound untill I moved back here and at first I thought it was my turbo grinding its self to a pulp.....turns out its was the warm up valve lol. Well one of these days I will have to go check out Kalispell, I dont think I have been out there yet.
Senior User
Joined: Feb 2007
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From: Granite Falls Washington
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Post Fiend
Joined: Jun 2006
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From: Central, Al
Montana the exhaust back pressure valve can be closed when the ambient temps are below 45*F and can continue to be commanded by the PCM until and oil Temp of 167*F. To be sure that is what it is drive at 40mph on a cold morning and feather the throttle you should hear a hiss, step on the pedal to accelerate and it should go away if working properly.
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From: Helmville MT
Originally Posted by MONTANA350
Jeff,
It's bone stock. I just don't remember it doing it last winter. BTW I was just in Hamilton two weeks ago...nice town!
Scott Johnson
Kalispell, MT
It's bone stock. I just don't remember it doing it last winter. BTW I was just in Hamilton two weeks ago...nice town!
Scott Johnson
Kalispell, MT
mike
New User
Joined: Feb 2007
Posts: 7
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From: Worley/Coeur D' Alene Ida
Hey, I'm new to the site, and my truck was making the same noise, i really noticed it after i put on the new exhaust. I believe this has answered my question. Oh by the way to all you Montana People, I'm from Coeur D' Alene, Idaho. I Guess we're neighbors. Thanks
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