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'18 V8 whistle during acceleration

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Old 09-09-2018, 10:51 AM
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Originally Posted by SinCityF150
If this was confirmed and not hear say, I would buy one right now.
It has absolutely fixed mine....so far! One thing i will mention is it has to be installed backwards. Or at least i think it's backwards.When you get it, it will have the letters "TB Side" stamped in the top of it with an arrow. Put this toward the intake. Not the throttle body. All you can hear on mine now is the whine from the crappy 10 speed when first taking off.
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Old 09-09-2018, 10:53 AM
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Originally Posted by jbone36
A member just posted a thread that an Airaid TB spacer got rid of his whistle on his ‘18....thought that’s been tried and posted about on here.
The more that i think about it, i believe the key to it is installing it backwards or at least i think it is backwards.
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Old 09-09-2018, 11:50 AM
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Originally Posted by thmsfraz
It has absolutely fixed mine....so far! One thing i will mention is it has to be installed backwards. Or at least i think it's backwards.When you get it, it will have the letters "TB Side" stamped in the top of it with an arrow. Put this toward the intake. Not the throttle body. All you can hear on mine now is the whine from the crappy 10 speed when first taking off.
How does it affect MPG's? If this is a cure (as far as the whistle goes), it makes me wonder if there are any metal burrs or slight machining imperfections within the TB that would cause it.
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Old 09-09-2018, 12:15 PM
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Originally Posted by jbone36


How does it affect MPG's? If this is a cure (as far as the whistle goes), it makes me wonder if there are any metal burrs or slight machining imperfections within the TB that would cause it.
Not really sure about the MPG difference. I have only had it on since Friday. Honestly i have been so happy that the whistle has stopped i haven't really paid much attention to anything else. When i took the throttle body off, i really looked it over good on the inside. It is very smooth. One thing i did notice was the throttle blade edges are very sharp. I first thought about filing those down but was afraid i would screw it up. The sharp edge on the throttle blade could be where the whistle come from. I think the spacer disrupts the air flow after it comes across the blade enough to quieten it down.
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Old 09-14-2018, 06:56 AM
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Originally Posted by MyronE.
Mine has it as well 2018 5.0 I just noticed it today cause in had the window down. 480 miles on it since I bought it last month. Also a weird clicking or rattle type sound we I quick tap the gas in drive or reverse. Thinking of taking it in.
Mine and every 5.0 I have driven makes that clicking/rattle when you let off the gas when cold. Very annoying.

Mine also makes this whistle sound, also annoying. No bulletins for these yet? Its September!
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Old 09-14-2018, 12:34 PM
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Originally Posted by arcticcatmatt
Mine and every 5.0 I have driven makes that clicking/rattle when you let off the gas when cold. Very annoying.

Mine also makes this whistle sound, also annoying. No bulletins for these yet? Its September!
You might have the rattle of the electronic coolant pump.
Every engine with A.S.S. has it to keep the coolant flowing during that annoying start and stop..
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Old 09-14-2018, 02:30 PM
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I just got my 2018 5.0 and mine is doing to me what it is apparently doing to you as well. I can not stand this sound and it shouldn't be a normal sound in a brand new vehicle.
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Old 09-14-2018, 02:39 PM
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My 18 has a faint whistle as well. It's not even close to being annoying though, at least to me, and definitely not something I'd even bring the truck in for.
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Old 09-25-2018, 06:49 PM
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Has anyone else tried the TB spacer?? Hoping this works...
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Old 09-25-2018, 06:55 PM
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Default 2018 f150 v8 stx whistle
I recently bought this truck. 200 miles on it and noticed the sound. To me it sounds like a intake noise. Similar to the 2016 2.7 EcoBoost turbo sound but..... this truck is not a turbo. Went by the dealership and listened to another truck same model. Heard the whistle but not as loud. I have the best warranty I could possibly get but I'd still like a legit explanation for the sound
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