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BBK whistles

1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

BBK whistles

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Old

Jul 30, 2016 | 06:30 AM

#1

chesster51

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Tuned

Joined: Jan 2013

Posts: 305

Likes: 7

From: Middleburg, FL

BBK whistles

Installed a BBK throttle body a few weeks ago and it has an annoying whistle the stock unit did not have. Is there a cure for this?

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Old

Jul 30, 2016 | 07:49 AM

#2

My4Fordtrucks

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Joined: Jun 2015

Posts: 12,811

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I have the 56mm on my pickup (stock 302) and the twin 61 on my Bronco ( Ford Motorsports 392) and neither one whistles. I'd say you have a vacuum leak somewhere- throttle body or IAC gasket?

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Old

Jul 30, 2016 | 09:44 AM

#3

chesster51

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Tuned

Joined: Jan 2013

Posts: 305

Likes: 7

From: Middleburg, FL

New gaskets on both, but I think you're right about a vacuum leak just have to hunt it down I guess.

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Old

Jul 30, 2016 | 01:23 PM

#4

Diesel_Brad

Fleet Owner

Joined: May 2009

Posts: 21,437

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From: Gilbert, PA

Whistle at an idle or under acceleration?

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Old

Jul 30, 2016 | 02:13 PM

#5

chesster51

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Tuned

Joined: Jan 2013

Posts: 305

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From: Middleburg, FL

mostly at low rpm driving. Haven't noticed it at higher rpm's

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Old

Jul 30, 2016 | 03:18 PM

#6

Diesel_Brad

Fleet Owner

Joined: May 2009

Posts: 21,437

Likes: 76

From: Gilbert, PA

Quote:

Originally Posted by chesster51

mostly at low rpm driving. Haven't noticed it at higher rpm's

Sounds to me like now you have a large about of air being drawn into the engine and THAT is what you are hearing

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