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5.0 Whistle WOT

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Old 08-21-2016, 09:02 PM
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Default 5.0 Whistle WOT

Anybody else have this with their 5.0?

I've never really opened it up until recently and noticed at high RPM's, there's a high pitch whistle. I realize this is most likely due to air accelerating through the TB and intake manifold, but wanted to know if it's just mine or if it's common on the 5.0. I don't remember my last one doing that.

If it is a common occurrence, it makes me wonder if the stock components are a little too restrictive for the engine's displacement.
Old 08-22-2016, 10:46 AM
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Originally Posted by gopherman
Anybody else have this with their 5.0?

I've never really opened it up until recently and noticed at high RPM's, there's a high pitch whistle. I realize this is most likely due to air accelerating through the TB and intake manifold, but wanted to know if it's just mine or if it's common on the 5.0. I don't remember my last one doing that.

If it is a common occurrence, it makes me wonder if the stock components are a little too restrictive for the engine's displacement.
Bump!
Old 08-22-2016, 10:53 AM
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Sorry I got nothing for you, I just cleaned my throttle body recently and just got a slight whistle. Not at WOT only as slight acceleration... Also only with my K&N system not my stock system (I swapped them to see if its coming from the TB or the tubes/filter)
Old 08-22-2016, 02:53 PM
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Whistle while you work?

No whistling here, just a nice roar.

Check your air filter
Old 08-22-2016, 03:02 PM
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Originally Posted by srg963
Whistle while you work?

No whistling here, just a nice roar.

Check your air filter
Interesting.

Yeah...that was my first guess but figured since it's essentially a brand new truck, the filter shouldn't matter. Looks like I'll be setting up my first service appointment :-/
Old 08-22-2016, 03:05 PM
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Originally Posted by gopherman
Interesting.

Yeah...that was my first guess but figured since it's essentially a brand new truck, the filter shouldn't matter. Looks like I'll be setting up my first service appointment :-/
I would wait until it's broken in somewhat before you take it in to the dealership, the noise may go away.

Most of my visits were a big waste of time.
Old 08-22-2016, 03:09 PM
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Originally Posted by srg963
I would wait until it's broken in somewhat before you take it in to the dealership, the noise may go away.

Most of my visits were a big waste of time.
I mean...it's about to hit 5000 miles so it's fairly broken in.

I figured this was just a characteristic of the 5.0 so I'm fairly disappointed that it's an anomaly. It's gotta go in for it's next oil change anyway, so that's when I'll have them take a look. I just know the typical answer..."It's working as designed..."

So obnoxious. At least I'll have it documented then.
Old 08-22-2016, 04:38 PM
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May be the air inlet rubber or something loose. I would check everything I could before taking it in.

Check out the CAI.
Old 08-22-2016, 04:39 PM
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Mine has done this since day 1. 4000km on it now

Originally Posted by gopherman
Anybody else have this with their 5.0?

I've never really opened it up until recently and noticed at high RPM's, there's a high pitch whistle. I realize this is most likely due to air accelerating through the TB and intake manifold, but wanted to know if it's just mine or if it's common on the 5.0. I don't remember my last one doing that.

If it is a common occurrence, it makes me wonder if the stock components are a little too restrictive for the engine's displacement.
Old 08-22-2016, 05:26 PM
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Originally Posted by 19ontheice
Mine has done this since day 1. 4000km on it now
Weird that some of us have it and some of don't. Maybe it's a sensitivity thing...I don't know. Either way...if it's not supposed to be there (and according to a service rep at the dealer), it's not, then I'm going to get it fixed.


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