Vacuum Noise
07-02-2009, 05:04 PM
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Vacuum Noise
Need a little help in locating a wind or vacuum noise.
Problem: Can hear what to me sounds like a vacuum noise coming from under the dash
Observations:
Starts at about 35 to 40 mph.
Not rpm related.
When speed drops below 35 mph it shuts off.
Heat or AC on or off, same thing.
This is definitely speed related and is not wind noise.
Here’s the pisser: Totally random from my world. Happens after 10 minutes or 30 or not at all for a day or so. Of coarse it will never happen at the dealer. Spoke with them about it and they are happy to get into it. I guess what I am looking for is a few ideas on items that are speed sensitive. I would like to help my dealer out a little before they start looking under the dash.
Problem: Can hear what to me sounds like a vacuum noise coming from under the dash
Observations:
Starts at about 35 to 40 mph.
Not rpm related.
When speed drops below 35 mph it shuts off.
Heat or AC on or off, same thing.
This is definitely speed related and is not wind noise.
Here’s the pisser: Totally random from my world. Happens after 10 minutes or 30 or not at all for a day or so. Of coarse it will never happen at the dealer. Spoke with them about it and they are happy to get into it. I guess what I am looking for is a few ideas on items that are speed sensitive. I would like to help my dealer out a little before they start looking under the dash.
07-02-2009, 06:30 PM
#2
Instructor
Need a little help in locating a wind or vacuum noise.
Problem: Can hear what to me sounds like a vacuum noise coming from under the dash
Observations:
Starts at about 35 to 40 mph.
Not rpm related.
When speed drops below 35 mph it shuts off.
Heat or AC on or off, same thing.
This is definitely speed related and is not wind noise.
Here’s the pisser: Totally random from my world. Happens after 10 minutes or 30 or not at all for a day or so. Of coarse it will never happen at the dealer. Spoke with them about it and they are happy to get into it. I guess what I am looking for is a few ideas on items that are speed sensitive. I would like to help my dealer out a little before they start looking under the dash.
Problem: Can hear what to me sounds like a vacuum noise coming from under the dash
Observations:
Starts at about 35 to 40 mph.
Not rpm related.
When speed drops below 35 mph it shuts off.
Heat or AC on or off, same thing.
This is definitely speed related and is not wind noise.
Here’s the pisser: Totally random from my world. Happens after 10 minutes or 30 or not at all for a day or so. Of coarse it will never happen at the dealer. Spoke with them about it and they are happy to get into it. I guess what I am looking for is a few ideas on items that are speed sensitive. I would like to help my dealer out a little before they start looking under the dash.
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