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post #1 of 17 Old 09-17-2011, 04:59 PM Thread Starter
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Whoosh!

Whenever my truck has been sitting for a few days or more and I go to drive it, it makes this loud air rushing noise from under the hood and the boost gauge doesn't register much pressure... After a minute or so it all go to normal. Kind of sounds like the turbo is just dumping into the engine bay.

Normal or what?

2010 F250
12000 miles
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post #2 of 17 Old 09-17-2011, 05:22 PM
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Does it still drive OK when this is going on???
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post #3 of 17 Old 09-17-2011, 05:43 PM Thread Starter
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Originally Posted by Antonm View Post
Does it still drive OK when this is going on???

It drives like there's no turbo, but I sure can hear it...
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post #4 of 17 Old 09-17-2011, 05:54 PM
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Well I know my fan does that (engages sporadicly on startup), my boost pressure doesn't change, although I'm driving up my lane at very little throttle although at idle or slightly more (Say up to approx 1350rpm) my boost is pretty low (less than approx 7psi) anyways.

2008 (Job 1) F250 King ranch 4x4, snow plow prep package with 2.5 level. Black Maxx, B&W Diehard platinums. Dieselsite coolant and transmission filters, NCU Motorsports/amsoil oil bypass kit. Turbo blankets, 5.5 PMF traction
Please collect and message me Shell, Rotella oil cap codes aka "my miles matter" I'm trying to save up for a hat or something.
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post #5 of 17 Old 09-17-2011, 06:02 PM
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If there are no codes present and it feels like it has no boost, then I would check the intercooler for pressure, fuel rail pressure and ensure the all the boots are seated correctly and/or not blown.
Keep us posted,
Dom

13F --U.S. Army Retired
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post #6 of 17 Old 09-17-2011, 06:56 PM
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Quote:
Originally Posted by RUFFSTUFF View Post
It drives like there's no turbo, but I sure can hear it...
I would normally think it would be a boot leak, but boot leaks don't fix themselves after a few minutes of driving.
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post #7 of 17 Old 09-17-2011, 07:05 PM
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Originally Posted by RUFFSTUFF View Post
It drives like there's no turbo, but I sure can hear it...
So does it go back to normal driving or not?

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post #8 of 17 Old 09-17-2011, 07:06 PM Thread Starter
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Quote:
Originally Posted by Antonm View Post
I would normally think it would be a boot leak, but boot leaks don't fix themselves after a few minutes of driving.

It's not even a few minutes... The longest its taken to get back to normal was less than 1/2 mile. And again, this is only after it has been sitting for a few days or more. About 2 months ago I started driving it about once a week unless I needed to. The dealer is a mile from my house... It would be fine before I ever got there...
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post #9 of 17 Old 09-17-2011, 07:08 PM Thread Starter
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Originally Posted by strivingfirst View Post
So does it go back to normal driving or not?
It sure does. Drives like the boosted tank it is...


Of course, I said that in the first post, but that's just a minor detail.
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post #10 of 17 Old 09-17-2011, 10:31 PM
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Quote:
Originally Posted by 44magnum View Post
Well I know my fan does that (engages sporadicly on startup), my boost pressure doesn't change, although I'm driving up my lane at very little throttle although at idle or slightly more (Say up to approx 1350rpm) my boost is pretty low (less than approx 7psi) anyways.
This is your answer right here. Its the engine fan.

Robert
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