Rattle at 3200ish RPM?

[TexasTruck]

I have poked and prodded at everything with hoping to find a piece of plastic or clamp that’s resonating. I think the engine definitely has a resonance at 3200, but it is for sure causing something to rattle

Me too. There is a heat shield on the drivers side catalytic converter. I knocked on it some, seems solid, slight "rattle" maybe, hard to say. Maybe it's the guts inside the catalytic converter. I'm wondering if it's something after the 'Y' pipe too (muffler/resonator/etc.).

I wonder if this issue would get better (or worse) with aftermarket exhaust. Perhaps the pressure change will effect it.

I regularly tow ~4K lbs, once I hit 1K miles I'm going to the lake. My concern is how frequent will I get in to the 3K+ RPM range pulling off the line or incline...

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[TexasTruck]

That is what I have decided to do. Not worth the hassle. I have had two dealerships tell me it's normal or at least present on the other lot trucks the

It is indeed a odd noise. I can't for the life of me figure it out. Engine runs strong at 15k been doing it since about 5k. Gonna have to let it sing and see if anything breaks. I think you might be correct in saying it's a resonance issue. By any chance do you have the slight vibration in the gas pedal? I'm trying to see if the two issues are related.

I took the RPMs to 3.2K yesterday, again, not for long just until it shifted and fell below 3K. I experienced the vibrating gas pedal now. It's not a little buzz in your foot either. There is also a flat spot in performance if you will at 3.2K RPM. Difficult to discribe, almost like it doesn't or you shouldn't go beyond that RPM. It interrupts the smoothness of the acceleration. Meaning, when you keep the RPMs below 3K, the engine has a nice tone/rumble, peppy, zippy, normal you can say, then when you hit that 3K+ things aren't so normal.

Time will tell as they say....

 

[Hockeymandan13]

I took the RPMs to 3.2K yesterday, again, not for long just until it shifted and fell below 3K. I experienced the vibrating gas pedal now. It's not a little buzz in your foot either. There is also a flat spot in performance if you will at 3.2K RPM. Difficult to discribe, almost like it doesn't or you shouldn't go beyond that RPM. It interrupts the smoothness of the acceleration. Meaning, when you keep the RPMs below 3K, the engine has a nice tone/rumble, peppy, zippy, normal you can say, then when you hit that 3K+ things aren't so normal.

Time will tell as they say....

Next time you remote start it can you look under the front edge of the driver's door where the exaust from the driver side clamps together with the cross pipe(right under the pedals) and see if you have a good amount of blow out condensation (dropping/peeing water)? I'm curious if the vibration in the pedal is due to exaust gas leakage and the rattle is the two pieces being not tight enough when harmonics are just right. Long shot but one thing to eliminate lol. Mine pees a lot there and I haven't messed with it as it's getting ceramic coat this weekend.

 

[Mtnman1]

I listened for it with the window closed and I heard it up front under the hood as well. Might take it to Quick Lane and see what they say.

Quick lane???

 

[tony72cutlass's']

Hey Guys,

Update i finally went for a ride along with the service manager at my dealership. He distinctly heard it at 3200-3300RPM and said he had heard it on one other truck before (but that was not the issue under investigation so they did not dig any deeper).

Now that he knows what to look for he is going to do some research as well as take a few new 5.0's for a ride next week and report back.

I asked him at a bare minimum i want all my modules updated in case there is some update in the PCM that i dont have that could be affecting my truck (good opportunity to get all the OTA's that i've missed).

 

[tony72cutlass's']

Update from the head service tech is that he drove two brand new 2022 5.0's and one 2021 5.0 and all have the same buzz at 3200RPM so they are not willing to take it any further other than to call it a normal characteristic.

 

[TexasTruck]

Update from the head service tech is that he drove two brand new 2022 5.0's and one 2021 5.0 and all have the same buzz at 3200RPM so they are not willing to take it any further other than to call it a normal characteristic.

Oh bummer..... I mean just 'cuz others do it doesn't means it right I don't get the sound when I slowly accelerate to 3200 and beyond. It seems to fester when you accelerate aggressively; when the engine has a significant load.

Any way, thanks for checking with your dealer and taking the time to follow up @tony72cutlass's'

 

[tony72cutlass's']

Oh bummer..... I mean just 'cuz others do it doesn't means it right I don't get the sound when I slowly accelerate to 3200 and beyond. It seems to fester when you accelerate aggressively; when the engine has a significant load.

Any way, thanks for checking with your dealer and taking the time to follow up @tony72cutlass's'

No problem, we're all in this together!

I'm wondering if there is some slop in the valvetrain. 4 of the cyliders have special rockers that are able to deactivate. Maybe they're just noisy by design.

 

[Nomis]

Here's audio from a go pro mounted next to the battery inside the engine bay

My truck is now making the exact same sound at 3200 rpm. 2200 km on it. Not super pumped about my first ford at this point.


Edit: Went for a drive with the shop foreman this morning and he said it's the intake and these new ones sound "throaty". I said no... It is not the intake. Either he has selective hearing or is an idiot. I dropped it off to get linex eibach tire etc installed and he said he would drive a couple 5.0 to see if they sound the same. But Im not sure if he even really knows the sound I was referring to, even though i drove it in manual and let it hang at 3200 RPM.

The sound is very obviously not intake noise. I told him it sounds like the engine is starving for oil and he just kinda mumbled and didn't say much.

 

[Nomis]

Double post.

Please delete.

 

[tony72cutlass's']

My truck is now making the exact same sound at 3200 rpm. 2200 km on it. Not super pumped about my first ford at this point.


Edit: Went for a drive with the shop foreman this morning and he said it's the intake and these new ones sound "throaty". I said no... It is not the intake. Either he has selective hearing or is an idiot. I dropped it off to get linex eibach tire etc installed and he said he would drive a couple 5.0 to see if they sound the same. But Im not sure if he even really knows the sound I was referring to, even though i drove it in manual and let it hang at 3200 RPM.

The sound is very obviously not intake noise. I told him it sounds like the engine is starving for oil and he just kinda mumbled and didn't say much.

that is the exact sound mine makes 3200 and then 3800-ish. The head tech at my dealership said he tried a bunch of brand new ones and they all make the same sound.

if you watch a bunch of 5.0 2021+ review videos, most of them also make the same sound if you listen hard enough. sucks but sounds like it is what it is from ford

interesting tidbit, if i really get into my throttle (say 75% or more), it completely goes away. This leads me to believe the engine sounds like this when it's a leaner mixture rather than richer at full bore

 

[Nomis]

I took the RPMs to 3.2K yesterday, again, not for long just until it shifted and fell below 3K. I experienced the vibrating gas pedal now. It's not a little buzz in your foot either. There is also a flat spot in performance if you will at 3.2K RPM. Difficult to discribe, almost like it doesn't or you shouldn't go beyond that RPM. It interrupts the smoothness of the acceleration. Meaning, when you keep the RPMs below 3K, the engine has a nice tone/rumble, peppy, zippy, normal you can say, then when you hit that 3K+ things aren't so normal.

Time will tell as they say....

Mine has the exact same performance flat spot you describe. For the first 2000 km it did not. @Ford Motor Company Why does my brand new truck have an engine that sounds like it is going to pile up and is lacking the power it had when I first drove it?

 

[uncleporkchop]

My truck is now making the exact same sound at 3200 rpm. 2200 km on it. Not super pumped about my first ford at this point.


Edit: Went for a drive with the shop foreman this morning and he said it's the intake and these new ones sound "throaty". I said no... It is not the intake. Either he has selective hearing or is an idiot. I dropped it off to get linex eibach tire etc installed and he said he would drive a couple 5.0 to see if they sound the same. But Im not sure if he even really knows the sound I was referring to, even though i drove it in manual and let it hang at 3200 RPM.

The sound is very obviously not intake noise. I told him it sounds like the engine is starving for oil and he just kinda mumbled and didn't say much.

I'm no mechanic but, this seems normal to be variable timing changing. Like pressing the keys on a trumpet changing the valves tune creating a different pitch in sound. the sound seems to come through the plastic intake because that's near where the magic is happening. This noise bothered me at first on my 2021 5.0 but they all sound like this. This isnt the 200hp 5.0 (302ci) v8 with 9:1 compression we've all had growing up. These new engines 5.0 (307ci) are 400hp with 12:1 compression. They gonna sing when the power is applied.. just my non-mechanic thoughts.

 

[5.0rattlenoise]

Reviving an old thread, but my brand new 2023 5.0 has the same thing. Has anyone solved this problem?

 

[tony72cutlass's']

Reviving an old thread, but my brand new 2023 5.0 has the same thing. Has anyone solved this problem?

i switched to Mobil 1 full synthetic (my old faithful oil) and it is mostly gone. It's still there if you really really listen but i would say 80% better.

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