New Weird Problem - Ford Mustang Forum
 
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post #1 of 15 (permalink) Old 05-07-2013 Thread Starter
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New Weird Problem

This just started a week or so ago. A high frequency, fairly noticeable vibration inside the dash occurs at speeds over 70 mph. It took a bit but I figured out it only happens when fresh air is flowing into the HVAC system from the outside. I can kill the vibration noise by hitting the Recirc button or turning off the HVAC system completely. Neither the vent settings, the fan or heater settings affect it in any way, just letting fresh air in at those speeds.

I called my dealer and the service manager can't authorize one of their techs to drive at those speeds to duplicate it and they're not gonna tear into the dash w/o replicating the issue first. I sorta get their attitude. My car is still under warranty.

I checked the seating of the cabin filter and it seemed fine. I may just pull that out for now and see if it stops.

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Driving it since 5/09/2011

Add ons: Ford Mustang STB, Epco Rally stripe shifter ball, AFE non-oiled Air filter, Airaid mid pipe, GT500 Splash Guards.
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post #2 of 15 (permalink) Old 05-07-2013
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Turn the radio up.

Problem solved.

Or get a louder exhaust.
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post #3 of 15 (permalink) Old 05-07-2013
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well since the speed limit is 65 I'm sure this only happens rarely.

I would pull the cabin air filter as you suggested seems like an easy try. I used to own an Integra that would whistle at speeds over 95....I was glad when it started leaking during rain as that was an issue I could bring to the dealer (windshield seal)

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post #4 of 15 (permalink) Old 05-07-2013
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I think they are still obligated to look for the issue. The car is rated for 100+ mph.
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post #5 of 15 (permalink) Old 05-07-2013
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Tell the service advisor that YOu will drive and the tech can ride with you.

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post #6 of 15 (permalink) Old 05-07-2013 Thread Starter
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Quote:
Originally Posted by C Green View Post
Tell the service advisor that YOu will drive and the tech can ride with you.
I was thinking of doing that.

2012 Kona Blue V6 6MT Pony package. 2.73 rear end, comfort package, Charcoal leather interior.

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Add ons: Ford Mustang STB, Epco Rally stripe shifter ball, AFE non-oiled Air filter, Airaid mid pipe, GT500 Splash Guards.
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post #7 of 15 (permalink) Old 05-20-2013 Thread Starter
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If you care:

I eliminated this noise by trying two things:
1. as you've probably figured out the plastic threaded connectors holding down the cowl over the cabin filter are pretty damn flimsy. One fastener basically failed and couldn't hold down the cowl securely leaving over 1/4" of play. I replaced the fastener for a snug fit.
2. removed the cabin air filter.

No more noise. I want to experiment a bit more and put back the filter to see if the vibration comes back. One thing I can say is the air flow into the car is pretty good right now.

2012 Kona Blue V6 6MT Pony package. 2.73 rear end, comfort package, Charcoal leather interior.

Driving it since 5/09/2011

Add ons: Ford Mustang STB, Epco Rally stripe shifter ball, AFE non-oiled Air filter, Airaid mid pipe, GT500 Splash Guards.
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post #8 of 15 (permalink) Old 06-03-2013
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Quote:
Originally Posted by hammergjh View Post
If you care:

I eliminated this noise by trying two things:
1. as you've probably figured out the plastic threaded connectors holding down the cowl over the cabin filter are pretty damn flimsy. One fastener basically failed and couldn't hold down the cowl securely leaving over 1/4" of play. I replaced the fastener for a snug fit.
2. removed the cabin air filter.

No more noise. I want to experiment a bit more and put back the filter to see if the vibration comes back. One thing I can say is the air flow into the car is pretty good right now.
Any update on this? I am having the exact same problem...2011 V6. Took it in a few months ago not knowing the vibration was coming from the air vents, thought it was the windshield. Dealer thought I was crazy.

Did some experimenting on my own and found that the noise is definitely coming from the passenger air vent at high speeds (60+), and stops when the recirculating air button is turned on.

Was the loose fastener on the cowl the issue? Did you ever put the air filter back in?
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post #9 of 15 (permalink) Old 06-03-2013 Thread Starter
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Yes I did put the cabin filter back in and it's fine. The issue is due to the cheap plastic screw fasteners failing to hold down the plastic cowl cover. I discovered if the cowl isn't held down snugly, it will vibrate at high speeds. So, for 2 dollars, replace them and no more noise.

Glad I could be of help.

2012 Kona Blue V6 6MT Pony package. 2.73 rear end, comfort package, Charcoal leather interior.

Driving it since 5/09/2011

Add ons: Ford Mustang STB, Epco Rally stripe shifter ball, AFE non-oiled Air filter, Airaid mid pipe, GT500 Splash Guards.
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Ah another cheap part by Ford causing an issue. The more I read and learn about cheap shortcuts the less confident I am in this car lasting 10 years without being a money pit.
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Quote:
Originally Posted by hammergjh View Post
Yes I did put the cabin filter back in and it's fine. The issue is due to the cheap plastic screw fasteners failing to hold down the plastic cowl cover. I discovered if the cowl isn't held down snugly, it will vibrate at high speeds. So, for 2 dollars, replace them and no more noise.

Glad I could be of help.
Sweet, glad I stumbled across this thread!

I'll take a look at the fasteners today. One more question, where did you find the replacement fasteners?
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I purchased some extra fasteners from Tously Ford, cowl, radiator cover, oil filter panel. They have come in handy when one drops into the engine bay or becomes worn out. All were purchased for about $5. Tousley's IPBs makes finding & ordering parts easy.

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Ah another cheap part by Ford causing an issue. The more I read and learn about cheap shortcuts the less confident I am in this car lasting 10 years without being a money pit.
Then you are starting to grasp what Ford cars are all about.

If you have the proper expectations, you will be disappointed less often.

Ford cars look and drive great, with high levels of content.....for a very "reasonable" ammount of money. The price to be paid is in quality and reliability.

Price, content and quality/reliability. Choose the two you want, because you cannot have all three.
post #14 of 15 (permalink) Old 06-03-2013 Thread Starter
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I got the fasteners from Pep Boys. They had a pretty good variety. 2 bucks for 2. Not exactly the same part as OEM but better quality.

2012 Kona Blue V6 6MT Pony package. 2.73 rear end, comfort package, Charcoal leather interior.

Driving it since 5/09/2011

Add ons: Ford Mustang STB, Epco Rally stripe shifter ball, AFE non-oiled Air filter, Airaid mid pipe, GT500 Splash Guards.
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Angry Sweet Vibrations

Quote:
Originally Posted by RedWings View Post
Turn the radio up.

Problem solved.

Or get a louder exhaust.
Have and tried both. I thought it was something vibrating in my passenger door/vent but it turns out at high speeds my rear view mirror is vibrating... Sometimes a nice forceful push upward on it temporarily fixes it, other times it doesn't.

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