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Low RPM Whine

B

Battle Design

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#1
2018 Fist 1500 miles.

Just above idle there is a high pitched whining sound. It almost sounds like a bad beating. It goes away as RPMs come up. It doesn't seem to be affecting performance.

Anyone have this issue before ?
 


TyphoonFiST

TyphoonFiST

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Battle Design said:
2018 Fist 1500 miles.

Just above idle there is a high pitched whining sound. It almost sounds like a bad beating. It goes away as RPMs come up. It doesn't seem to be affecting performance.

Anyone have this issue before ?
Click to expand...
In all gears? Or just certain gears? Video also?


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felopr

felopr

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#3
Battle Design said:
2018 Fist 1500 miles.

Just above idle there is a high pitched whining sound. It almost sounds like a bad beating. It goes away as RPMs come up. It doesn't seem to be affecting performance.

Anyone have this issue before ?
Click to expand...
Never had this issue myself
your have a warranty still , take it to the dealer and complain about it.
 


OP
B

Battle Design

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It seems to be only in 1st since the rpms arent low enough in other gears.

Almost sounds like maybe the turbo bearings.
 


L

LaserWhisperer

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Does anyone happen to know if 1st is a spur- cut/ straight cut gear? If so, that could be what you're hearing.
Does it sound similar to the noise in reverse?
 


danbfree

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LaserWhisperer said:
Does anyone happen to know if 1st is a spur- cut/ straight cut gear? If so, that could be what you're hearing.
Does it sound similar to the noise in reverse?
Click to expand...
I know that this was the case with the Kia turbo I traded in for my FiST, they used non-helical for 1st/reverse combo but I don't think that applies to ours... Personally, I'm at only 7,500 and have had a 6th gear whine since almost new... I'm probably just going to try the 2 full liters of Ravenol MTF-2 to resolve mine as I'm tuned and don't need the hassle of taking it to the dealer...
 


Last edited:
MYenvyST14

MYenvyST14

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Tensioner on the alternator..alot of them make the sound..its like a purrring. You can hear it with a slight rev, as it returns to idle
 


MYenvyST14

MYenvyST14

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I had a 14 and it made the sound..had ford replace it under warranty and made the exact same sound upon return. Ending up selling and a year later I got a 16..same noise lol..i hear it a lot in videos on line..its right as the car comes to idle or just a slight throttle input. Don't worry bout it
 


TyphoonFiST

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MYenvyST14 said:
I had a 14 and it made the sound..had ford replace it under warranty and made the exact same sound upon return. Ending up selling and a year later I got a 16..same noise lol..i hear it a lot in videos on line..its right as the car comes to idle or just a slight throttle input. Don't worry bout it
Click to expand...
Please produce a video...I'D like to compare my noise to the video![wrenchin]
 


R

robbie_d

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I think it's the timing belt tension changing at low speed as the ecu is manipulating variables. There is variation in timing belt tightness, especially with age, leading to different people having different levels of sound. My wife and I both have 16's and both do it some. I need the hood up standing near the engine, but I can hear it clearly. Always thought it was normal. While it's a total guess, I just think the belt is making the noise. Think of all this little teeth whirring around behind a thin cover.
 


TyphoonFiST

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Does it do it at 60mph on throttle and then release throttle and it goes away?


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