2015 Mystery Engine Noise - Need HELP!
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Junior Member
Joined: Jan 2017
Posts: 3
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2015 Mystery Engine Noise - Need HELP!
2015 F150 2.7 Eco Boost With 23,000 miles
Makes the strangest noise when I'm going down the road on cruise control around 40 mph (happens at various speeds but most common at 40). Has happened at various outside temperatures from 23F to 76F. Sound will typically last a few seconds however if it comes on going up a hill it will last until I do something to slow the truck such as braking or disengaging cruise control. Sound always goes away instantly whenever I do anything to slow the speed of the truck. Sound is a loud mechanical scraping/grinding noise. Sounds like your dragging a piece of sheet metal or what I would imagine sounds like a number of metal cans thrown in a blender. Sound comes from the engine compartment and vibrations can be felt in the pedals and floor. I've taken it to the dealer and was able to replicate it on a test drive however they still don't know what it is. They tested the vacuum system and said it was good. Here is a link to a video of a guy who seems to have experienced the same problem I am having. The audio is a little week in the video though and it is much louder and intimidating in person.
Please HELP!!!
Makes the strangest noise when I'm going down the road on cruise control around 40 mph (happens at various speeds but most common at 40). Has happened at various outside temperatures from 23F to 76F. Sound will typically last a few seconds however if it comes on going up a hill it will last until I do something to slow the truck such as braking or disengaging cruise control. Sound always goes away instantly whenever I do anything to slow the speed of the truck. Sound is a loud mechanical scraping/grinding noise. Sounds like your dragging a piece of sheet metal or what I would imagine sounds like a number of metal cans thrown in a blender. Sound comes from the engine compartment and vibrations can be felt in the pedals and floor. I've taken it to the dealer and was able to replicate it on a test drive however they still don't know what it is. They tested the vacuum system and said it was good. Here is a link to a video of a guy who seems to have experienced the same problem I am having. The audio is a little week in the video though and it is much louder and intimidating in person.
Please HELP!!!
5 Year Member
Joined: May 2013
Posts: 1,251
Likes: 263
From: San Antonio, Texas
Do you have the A/C on when it happens? If so, see if it does it with the A/C off. The way it stops so suddenly make me think it could be the A/C compressor. The A/C clutch engages and it slowly starts to make noise. Then it stops in an instant when the clutch disengages. If the clutch isn't fully connecting with the a compressor they'll be spinning at 2 different speeds and sound like metal rubbing.
Senior Member
Joined: Sep 2015
Posts: 486
Likes: 116
From: Waugh, AB
Is your truck a 4x4?
Sounds like IWE or check valve issue perhaps.
If it is a 4x4, put it in 4 high and see if the sound goes away.
This will confirm.
Another thing to check is loose exhaust shields just to eliminate the possibility.
Sounds like IWE or check valve issue perhaps.
If it is a 4x4, put it in 4 high and see if the sound goes away.
This will confirm.
Another thing to check is loose exhaust shields just to eliminate the possibility.
