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F150 Exhaust whistle #5078832 04/18/19 01:20 PM
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Redright9 Offline OP
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Hello,

A friend of mine has a 2011 (I believe) F150 with the 3.5l Eco boost engine. It has a Magnaflow aftermarket exhaust on it and seems to make a noise like when you are blowing over the top of a tube or straw. Its like a whistle type noise. It happens only when you are in the throttle, not towing or loaded, at about 60-70mph... When I road in it, it seems like its coming from the exhaust, is this just what the aftermarket systems sound like?

I don't think its from the engine.. anyone else have this?

Thanks.

Re: F150 Exhaust whistle [Re: Redright9] #5078841 04/18/19 01:25 PM
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mattd Offline
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Is it coming out of the coolant bottle cap?

Check for boost leaks too.


2007 Ford F-350 4x4 6.0 PSD

ASE Master, L1, L2
Re: F150 Exhaust whistle [Re: mattd] #5078842 04/18/19 01:28 PM
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Redright9 Offline OP
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Originally Posted by mattd
Is it coming out of the coolant bottle cap?

Check for boost leaks too.



Seems to come from the back of the truck (but I don't have great hearing either)... It wont do it revving the engine, has to be just the truck (not towing) and then jumping on the throttle at highway speeds. Has tons of power, so I don't think boost leaks. Plus if it happened while towing I would guess boost leaks. but only when truck is empty.

Re: F150 Exhaust whistle [Re: Redright9] #5078844 04/18/19 01:30 PM
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andyd Offline
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After mkt exhaust and a whistle, I know where I'd be looking. I know me. grin2


'16 Camry LE STP synth 0w20 and STP filter. the Fridge

1994 Ranger ,the Rat, 5w30 dino, STP filter

'16 Camry SE, Valvoline HM 0w20 and OEM filter
Thick oil is better grin2
Re: F150 Exhaust whistle [Re: Redright9] #5078961 04/18/19 03:02 PM
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spk2000 Offline
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Need an inline resonator to remove the high pitch whistle you are hearing.
ford is putting them on the OE exhaust systems to remove that whistle or high pitch


96 Grand Marquis 203,000 mi
01 Sable LS Wagon 163,000 mi
02 Montero 191,000 mi
03 Sable LS Sedan 73,000 mi
Re: F150 Exhaust whistle [Re: Redright9] #5078967 04/18/19 03:07 PM
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RhondaHonda Offline
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Are you sure it’s not the turbos making noise? On my 2019 Ecoboost I can hear the turbos with the window down but there’s not a trace of a whistle when the windows are up.


2019 Ford Raptor
2017 Corvette Grand Sport
2017 Yukon XL Denali
Re: F150 Exhaust whistle [Re: Redright9] #5078989 04/18/19 03:31 PM
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Srt20 Offline
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Sounds like you are hearing boost come out the exhaust.

Re: F150 Exhaust whistle [Re: Redright9] #5079014 04/18/19 03:56 PM
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1978elcamino Offline
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He is in California, the truck probably went to Bubb Rubb for the exhaust. Check it out on youtube. The wistle go woo wooooo!

Re: F150 Exhaust whistle [Re: 1978elcamino] #5079038 04/18/19 04:11 PM
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Redright9 Offline OP
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Originally Posted by 1978elcamino
He is in California, the truck probably went to Bubb Rubb for the exhaust. Check it out on youtube. The wistle go woo wooooo!


LOL!!! Too funny! The truck has a proper exhaust, I think it may just be "normal" for the truck with the turbos...

Re: F150 Exhaust whistle [Re: Redright9] #5079093 04/18/19 05:12 PM
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Linctex Offline
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You are most likely just hearing turbo noise


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Re: F150 Exhaust whistle [Re: Redright9] #5079122 04/18/19 05:46 PM
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Tdog02 Offline
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Could be blow off valve. Did the previous owner put a cold air intake on it? That's a potential noise source. Also check the charge pipes for some leaks.


09 Venza 2.7 114k 5w-30 Qsud
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Re: F150 Exhaust whistle [Re: Redright9] #5079134 04/18/19 05:55 PM
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spk2000 Offline
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Resonator vs no resonator - not sure if this helps but it might give you an idea if this is the issue

https://www.youtube.com/watch?v=uuOLY7Hp-KM


96 Grand Marquis 203,000 mi
01 Sable LS Wagon 163,000 mi
02 Montero 191,000 mi
03 Sable LS Sedan 73,000 mi
Re: F150 Exhaust whistle [Re: Redright9] #5079437 04/19/19 03:58 AM
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DoubleWasp Offline
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My Rams sound like half of an old time steam whistle when exhaust brake is on, slowing down. Sounds like half a vacuum cleaner too.

Kinda jealous of the free breathing PSDs. They sound like near-boil tea kettles at idle, and full boil under acceleration.

If he's looking for good resonators to add to his exhaust, try the Vibrant Quiet Series. I have them in my Lincoln and it sounds exactly like stock with no cats. Modular Ford's usually sound like they are trying to cough up soup can lids without them. Great way to get rid of wanted exhaust harmonics.


07 Lincoln Navigator M1 0w-40/FU
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Re: F150 Exhaust whistle [Re: Redright9] #5079837 04/19/19 11:52 AM
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It's your neighbor's kid!
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