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Knocking Noise from Underneath the car when Idling/at Idle

noises idle idling

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3 replies to this topic

#1 joswald21

joswald21

    New Member

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  • Region:U.S. Northeast
  • LocationPhiladelphia Area
  • My MKZ's Year:Decline
  • My MKZ: mymkz
  • Current Vehicle:2017 Lincoln MKZ

Posted 02 December 2017 - 02:14 PM

Hello...we bought our MKZ on 2017-11-25.

 

My wife and I have both heard a rhythmic knocking noise that seems to occur after the car has been idling for several minutes.

 

I'm 95% sure that it's coming from underneath the car.  It seems to be loudest at the rear floor just behind the front seats.  It MAY even be happening more toward the driver's side of the car.

 

Is anyone else hearing the same kinda thing?

 

Any ideas?


Edited by joswald21, 02 December 2017 - 02:25 PM.






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#2 drolds1

drolds1

    New MKZ Member

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  • Region:Decline
  • LocationLI, NY
  • My MKZ's Year:Decline
  • My MKZ: mymkz
  • Current Vehicle:2017 MKZ 3.0T AWD Sport Package

Posted 03 December 2017 - 02:16 AM

I have no noise like that.  Maybe part of the exhaust system is hitting the floor. You should definitely make a service appointment. 



#3 joswald21

joswald21

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  • Region:U.S. Northeast
  • LocationPhiladelphia Area
  • My MKZ's Year:Decline
  • My MKZ: mymkz
  • Current Vehicle:2017 Lincoln MKZ

Posted 07 December 2017 - 09:44 PM

The car (2017 MKZ 2.0 AWD) was at the dealer today.  They say that they only heard the normal EcoBoost High Injection Pump noise characteristic of the 2.0 turbo.

 

What I don't know is whether that is the same noise my wife and I heard.  I don't know for sure, but I think the pump noise would come from under the hood.

 

The next time I hear the noise, I'll be sure to make a quick video.


Edited by joswald21, 07 December 2017 - 09:55 PM.


#4 drolds1

drolds1

    New MKZ Member

  • Moderators
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  • Region:Decline
  • LocationLI, NY
  • My MKZ's Year:Decline
  • My MKZ: mymkz
  • Current Vehicle:2017 MKZ 3.0T AWD Sport Package

Posted 08 December 2017 - 03:20 AM

Sounds like BS to me.  I've had  several 2.0 service loaners and have never heard any knocking noise under the floor.  AFAIK, high pressure GDI pumps don't make knocking sounds.  Complaints about noise with these usually concern clicking of the injectors due to the high pressure they operate under.  Ask to drive another 2.0 MKZ and see if it's "normal."








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