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Old 21-03-2006, 08:03 PM   #1
digit
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Default Falcon AU making hissing noise

I have a 99 Falcon AU, everytime i push the accelerator i get a hissing noise which seems to go when pushed harder and can only be heard from inside the car, at about the same time this started happening, the internal blowers started blowing out of the windscreen vents when they were set to blow from the front - this also happens when you accelerate.

has anyone got any ideas?


cheers

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Old 21-03-2006, 08:07 PM   #2
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I got the same noise but when i back off. Ford said it was a vacume leak and that they had to take the dash out to fix it, been like that ever since...
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Old 21-03-2006, 08:12 PM   #3
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even though the noise is by the pedal? - the car also seems to be lacking a bit in performance and its only just passed 100.000kms
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Old 21-03-2006, 08:16 PM   #4
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I get the exact same thing from the brake pedal....
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Old 21-03-2006, 08:21 PM   #5
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Might be the headers.
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Old 21-03-2006, 08:29 PM   #6
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anything i can fix myself - or do i take it to a dealer

National Capital Motors and Ford In Canberra are not very bright - all the work they've done on the car i've re-done myself lately
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Old 21-03-2006, 09:14 PM   #7
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It could be the header bolts have lossend. I have heard of this happening on the AU 6. I don't know if you can do it yourself. I assume the bolts are easily accessable on a 6. I was suggest just maybe calling an exhaust place and tell them you have the hissing on acceleration and could the headers need tightening at the head?. Try Jeffro @ City Custom Exhaust in Braddon or Fred @ Tuggeranong Exhaust Centre in Tuggers.

Post the results. I would be curious to know the problem.
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Old 21-03-2006, 09:22 PM   #8
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i reckon someone installed a kick ИИИИ CAI while u werent lookind :nutsycuck ...sorry!!!
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Old 21-03-2006, 09:29 PM   #9
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Quote:
Originally Posted by dev5 ute
i reckon someone installed a kick ИИИИ CAI while u werent lookind :nutsycuck ...sorry!!!
now now come on

dont be like that
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Old 21-03-2006, 09:23 PM   #10
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Sounds like a heater vacuum control problem, either a vacuum hose hase come off or a vacuum diaphram has sprung a leak
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Old 21-03-2006, 09:30 PM   #11
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If the vents are blowing through the wrong places I'd say directional vacuum leak, either a vacuum hose has pulled off of the valve itself has failed. if you are confident, whip out the radio and console and have a look to see if you can see any hoses off.
Done any work in or around your dash lately? Speaker wires, radio, etc?. Easy to pull off the hoses in some cars.
Good luck. Don't have a coronary over it though.
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Old 21-03-2006, 10:13 PM   #12
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the blower button crumbled and had to replace that - about two weeks before it started going wrong, but i cant see that causing any real issues unless some of the button plastic got caught somewhere
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Old 21-03-2006, 10:24 PM   #13
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Quote:
Originally Posted by digit
the blower button crumbled and had to replace that - about two weeks before it started going wrong, but i cant see that causing any real issues unless some of the button plastic got caught somewhere
Possibly. Hard to say. Just trying to visualize the button crumbling. I have no idea if this is common. Can't really add anything except as stated above if you want to have a crack at it yourself.

Good luck friend
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Old 22-03-2006, 05:28 PM   #14
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thanks to all - will give it go this weekend and will let you know the outcome
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Old 22-03-2006, 05:54 PM   #15
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Take it to John McGrath's Ford in Woden mate - never go wrong there. Top notch job on all my problems...
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Old 04-04-2013, 08:57 PM   #16
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Default Re: Falcon AU making hissing noise

everytime i press the brake pedal i get a hissing noise from my 2002 au falcon
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Old 05-04-2013, 08:45 AM   #17
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Default Re: Falcon AU making hissing noise

Quote:
Originally Posted by gabbzy View Post
everytime i press the brake pedal i get a hissing noise from my 2002 au falcon
You need a new brake booster
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Old 04-04-2013, 09:11 PM   #18
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Default Re: Falcon AU making hissing noise

Its a vacuum leak in the heater control system. Its not holding vacuum when you accelerate.
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Old 04-04-2013, 10:23 PM   #19
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Default Re: Falcon AU making hissing noise

7 year thread mine, well done
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