Whistle
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Senior User
Joined: Feb 2003
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From: Bronx, New York
Whistle
Has anyone else had the ANNOYING problem of a loud whistle associated with a cold air intake ?? I just installed a new 75mm Throttle body, and now the sound is terrible annoying. It is so bad, I thought I had a vaccum leak INSIDE the truck !! When I had just the cold air, I had the sound, but it wasn't that bad. Any help/solutions would be appreciated........................
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Joined: Jul 2002
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From: Long Island USA
Whistle
Hi Junior,
What make of "cold air intake" did you install?
I have heard of a few cases of the angle of the bend in the tube being the culprit for the noise. Although they all look the same a small difference in the angle can cause a whistle. The addition of the new TB would, I think due to the increased flow into the intake increase the sound. The only solution was the removal of the tube and going with a different set up. If you don't want to go thru that expense, I would suggest going with the stock air intake with a K&N, Accel, BG Fuel, cotton gauze type filter. Hopefully this is helpful info.
Otherwise , Did you notice an improvement over stock with the new TB?
Steve
What make of "cold air intake" did you install?
I have heard of a few cases of the angle of the bend in the tube being the culprit for the noise. Although they all look the same a small difference in the angle can cause a whistle. The addition of the new TB would, I think due to the increased flow into the intake increase the sound. The only solution was the removal of the tube and going with a different set up. If you don't want to go thru that expense, I would suggest going with the stock air intake with a K&N, Accel, BG Fuel, cotton gauze type filter. Hopefully this is helpful info.
Otherwise , Did you notice an improvement over stock with the new TB?
Steve
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Senior User
Joined: Feb 2003
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From: Bronx, New York
Whistle
I don't know who made the intake, it is a 3" chrome pipe with a 90deg. bend into the throttle body. My air filter is a cone-type (K&N style), the re-usuable kind. I don't have any figures yet as to mpg gains with the 75mm TB, but I can tell you that I have felt the power increase from the mid to high band throttle range. Throttle response off the line is better too. It was a snap to install, just remove the intake piping, throttle linkage, and the TB comes right out with four 8mm bolts. I found the TB on ebay for $160 brand new in box. It did not come with a gasket, so use some of that silicone gasket maker. Use it sparingly, and wipe off the excess on the inside of the TB before it cures............Thanks for the info
Postmaster
Joined: May 2002
Posts: 3,028
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From: Annapolis, Maryland
Whistle
Hey gents - I had a similar whistling noise on my K&N FIPK. Turns out, the Ford factory hose that leads from the IAC to the intake is made out of hard plastic, and causes a whistle that appears to be amplified with the addition of an intake (I'm thinking it's because the stock intake is thick rubber). Replace it with a +/- 26" length of 3/4" fuel line - it should quiet things down a bit.
Let me know if you'd like further details/etc.
XXL
Let me know if you'd like further details/etc.
XXL
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From: Bronx, New York
Whistle
Thanks Matt. The hose in question runs behind the Throttle body, Right ? I see a small canister on that line about the size of a potato. Did you eliminate it, or run the hose to it, then to the iac ?
Thanks, Rich....
Thanks, Rich....
Postmaster
Joined: May 2002
Posts: 3,028
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From: Annapolis, Maryland
Whistle
Originally posted by Rtpjunior
Thanks Matt. The hose in question runs behind the Throttle body, Right ? I see a small canister on that line about the size of a potato. Did you eliminate it, or run the hose to it, then to the iac ?
Thanks, Rich....
Thanks Matt. The hose in question runs behind the Throttle body, Right ? I see a small canister on that line about the size of a potato. Did you eliminate it, or run the hose to it, then to the iac ?
Thanks, Rich....
If you like, I can borrow my dad's digital camera and snap a photo of the setup for you.
EDIT: Even if this doesn't totally eliminate your problem, it'll at least quiet things down considerably! Keep me posted.
XXL
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From: Bronx, New York
Whistle
I have to give thanks to our Moderator, Big Matt, for the advice. I spent $4 on a piece of 3/4" heater hose, and the sound is gone. Best $$$ ever spent............................
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Postmaster
Joined: May 2002
Posts: 3,028
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From: Annapolis, Maryland
Whistle
Originally posted by Rtpjunior
I have to give thanks to our Moderator, Big Matt, for the advice. I spent $4 on a piece of 3/4" heater hose, and the sound is gone. Best $$$ ever spent............................
I have to give thanks to our Moderator, Big Matt, for the advice. I spent $4 on a piece of 3/4" heater hose, and the sound is gone. Best $$$ ever spent............................
Makes me happy when other people are in a good mood
XXL
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Joined: Jul 2002
Posts: 719
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From: Long Island USA
Whistle
Does anyone know what that "Potato Thing" is and what it does? I could not help but laugh when I read that description.
Nothing better than a cheap simple fix!!! Gotta love it..........
Nothing better than a cheap simple fix!!! Gotta love it..........
Postmaster
Joined: May 2002
Posts: 3,028
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From: Annapolis, Maryland
Whistle
Originally posted by 1999XLT
Does anyone know what that "Potato Thing" is and what it does? I could not help but laugh when I read that description.
Nothing better than a cheap simple fix!!! Gotta love it..........
Does anyone know what that "Potato Thing" is and what it does? I could not help but laugh when I read that description.
Nothing better than a cheap simple fix!!! Gotta love it..........
Problem solved
XXL
