audi a4 whooshing noise
Guest
Posts: n/a
Re: audi a4 whooshing noise
Well, I had a similar experience: hissing/vacuum-like noise, and some
loss of power. If you're in the same boat, then if you read out your ECU
codes, you will see:
17965 - Charge Pressure Control: Positive Deviation
P1557 - 35-00 - -
(note, this does not set the CEL)
Cause for me was a split "vacuum" hose (but sometimes vacuum hoses are
under pressure in these cars. The leak was near where the vacuum lines T
off that feed the N75 boost regulation valve. This causes the boost
pressure to spike. Once that happens, the ECU limits max boost to ~4psi
to ensure no overboost is generated. That results in the crappy power
output.
For my split hose, at idle (when the "vacuum" system really is under
vacuum), just look around a bit. My hose was split so badly it had
collapsed, and hissing noises were pretty evident.
Good luck,
Arthur
wangela13 wrote:
> can someone please help, my car has been looked at a few times, when i
> accelerate there is a whoosing noise coming from the front of the car, it
> went to get fixed they said the turbo hose had burst then they said they
> couldnt find anything wrong with the hoses, it has just had a new air mass
> meter fitted because it was losing power, it has got some power back but
> feels like there should be more, dont know where this air is escaping
> from, it sounds like you have the windows down when accelerating, but it
> is definatley coming from under the bonnet.
>
loss of power. If you're in the same boat, then if you read out your ECU
codes, you will see:
17965 - Charge Pressure Control: Positive Deviation
P1557 - 35-00 - -
(note, this does not set the CEL)
Cause for me was a split "vacuum" hose (but sometimes vacuum hoses are
under pressure in these cars. The leak was near where the vacuum lines T
off that feed the N75 boost regulation valve. This causes the boost
pressure to spike. Once that happens, the ECU limits max boost to ~4psi
to ensure no overboost is generated. That results in the crappy power
output.
For my split hose, at idle (when the "vacuum" system really is under
vacuum), just look around a bit. My hose was split so badly it had
collapsed, and hissing noises were pretty evident.
Good luck,
Arthur
wangela13 wrote:
> can someone please help, my car has been looked at a few times, when i
> accelerate there is a whoosing noise coming from the front of the car, it
> went to get fixed they said the turbo hose had burst then they said they
> couldnt find anything wrong with the hoses, it has just had a new air mass
> meter fitted because it was losing power, it has got some power back but
> feels like there should be more, dont know where this air is escaping
> from, it sounds like you have the windows down when accelerating, but it
> is definatley coming from under the bonnet.
>
Guest
Posts: n/a
Re: audi a4 whooshing noise
Did they do a full pressure test on the hoses as a visual check will not
always see any splits !
I will put money on it being a split hose.
--
Jim B
http://smogthemog.blogspot.com/
http://tinyurl.com/on3sv
"Arthur Russell" <atr1_cornell@REMOVE_CAPS_AND_INVALIDyahoo.comINVA LID>
wrote in message news
ZednX1y2psuJxHYnZ2dnUVZ_oGlnZ2d@comcast.com. ..
> Well, I had a similar experience: hissing/vacuum-like noise, and some loss
> of power. If you're in the same boat, then if you read out your ECU codes,
> you will see:
> 17965 - Charge Pressure Control: Positive Deviation
> P1557 - 35-00 - -
> (note, this does not set the CEL)
>
> Cause for me was a split "vacuum" hose (but sometimes vacuum hoses are
> under pressure in these cars. The leak was near where the vacuum lines T
> off that feed the N75 boost regulation valve. This causes the boost
> pressure to spike. Once that happens, the ECU limits max boost to ~4psi to
> ensure no overboost is generated. That results in the crappy power output.
>
> For my split hose, at idle (when the "vacuum" system really is under
> vacuum), just look around a bit. My hose was split so badly it had
> collapsed, and hissing noises were pretty evident.
>
> Good luck,
> Arthur
>
> wangela13 wrote:
>> can someone please help, my car has been looked at a few times, when i
>> accelerate there is a whoosing noise coming from the front of the car, it
>> went to get fixed they said the turbo hose had burst then they said they
>> couldnt find anything wrong with the hoses, it has just had a new air
>> mass
>> meter fitted because it was losing power, it has got some power back but
>> feels like there should be more, dont know where this air is escaping
>> from, it sounds like you have the windows down when accelerating, but it
>> is definatley coming from under the bonnet.
>>
always see any splits !
I will put money on it being a split hose.
--
Jim B
http://smogthemog.blogspot.com/
http://tinyurl.com/on3sv
"Arthur Russell" <atr1_cornell@REMOVE_CAPS_AND_INVALIDyahoo.comINVA LID>
wrote in message news
ZednX1y2psuJxHYnZ2dnUVZ_oGlnZ2d@comcast.com. ..> Well, I had a similar experience: hissing/vacuum-like noise, and some loss
> of power. If you're in the same boat, then if you read out your ECU codes,
> you will see:
> 17965 - Charge Pressure Control: Positive Deviation
> P1557 - 35-00 - -
> (note, this does not set the CEL)
>
> Cause for me was a split "vacuum" hose (but sometimes vacuum hoses are
> under pressure in these cars. The leak was near where the vacuum lines T
> off that feed the N75 boost regulation valve. This causes the boost
> pressure to spike. Once that happens, the ECU limits max boost to ~4psi to
> ensure no overboost is generated. That results in the crappy power output.
>
> For my split hose, at idle (when the "vacuum" system really is under
> vacuum), just look around a bit. My hose was split so badly it had
> collapsed, and hissing noises were pretty evident.
>
> Good luck,
> Arthur
>
> wangela13 wrote:
>> can someone please help, my car has been looked at a few times, when i
>> accelerate there is a whoosing noise coming from the front of the car, it
>> went to get fixed they said the turbo hose had burst then they said they
>> couldnt find anything wrong with the hoses, it has just had a new air
>> mass
>> meter fitted because it was losing power, it has got some power back but
>> feels like there should be more, dont know where this air is escaping
>> from, it sounds like you have the windows down when accelerating, but it
>> is definatley coming from under the bonnet.
>>
Guest
Posts: n/a
Re: audi a4 whooshing noise
Did they do a full pressure test on the hoses as a visual check will not
always see any splits !
I will put money on it being a split hose.
--
Jim B
http://smogthemog.blogspot.com/
http://tinyurl.com/on3sv
"Arthur Russell" <atr1_cornell@REMOVE_CAPS_AND_INVALIDyahoo.comINVA LID>
wrote in message newsZednX1y2psuJxHYnZ2dnUVZ_oGlnZ2d@comcast.com. ..
> Well, I had a similar experience: hissing/vacuum-like noise, and some loss
> of power. If you're in the same boat, then if you read out your ECU codes,
> you will see:
> 17965 - Charge Pressure Control: Positive Deviation
> P1557 - 35-00 - -
> (note, this does not set the CEL)
>
> Cause for me was a split "vacuum" hose (but sometimes vacuum hoses are
> under pressure in these cars. The leak was near where the vacuum lines T
> off that feed the N75 boost regulation valve. This causes the boost
> pressure to spike. Once that happens, the ECU limits max boost to ~4psi to
> ensure no overboost is generated. That results in the crappy power output.
>
> For my split hose, at idle (when the "vacuum" system really is under
> vacuum), just look around a bit. My hose was split so badly it had
> collapsed, and hissing noises were pretty evident.
>
> Good luck,
> Arthur
>
> wangela13 wrote:
>> can someone please help, my car has been looked at a few times, when i
>> accelerate there is a whoosing noise coming from the front of the car, it
>> went to get fixed they said the turbo hose had burst then they said they
>> couldnt find anything wrong with the hoses, it has just had a new air
>> mass
>> meter fitted because it was losing power, it has got some power back but
>> feels like there should be more, dont know where this air is escaping
>> from, it sounds like you have the windows down when accelerating, but it
>> is definatley coming from under the bonnet.
>>
always see any splits !
I will put money on it being a split hose.
--
Jim B
http://smogthemog.blogspot.com/
http://tinyurl.com/on3sv
"Arthur Russell" <atr1_cornell@REMOVE_CAPS_AND_INVALIDyahoo.comINVA LID>
wrote in message news
ZednX1y2psuJxHYnZ2dnUVZ_oGlnZ2d@comcast.com. ..> Well, I had a similar experience: hissing/vacuum-like noise, and some loss
> of power. If you're in the same boat, then if you read out your ECU codes,
> you will see:
> 17965 - Charge Pressure Control: Positive Deviation
> P1557 - 35-00 - -
> (note, this does not set the CEL)
>
> Cause for me was a split "vacuum" hose (but sometimes vacuum hoses are
> under pressure in these cars. The leak was near where the vacuum lines T
> off that feed the N75 boost regulation valve. This causes the boost
> pressure to spike. Once that happens, the ECU limits max boost to ~4psi to
> ensure no overboost is generated. That results in the crappy power output.
>
> For my split hose, at idle (when the "vacuum" system really is under
> vacuum), just look around a bit. My hose was split so badly it had
> collapsed, and hissing noises were pretty evident.
>
> Good luck,
> Arthur
>
> wangela13 wrote:
>> can someone please help, my car has been looked at a few times, when i
>> accelerate there is a whoosing noise coming from the front of the car, it
>> went to get fixed they said the turbo hose had burst then they said they
>> couldnt find anything wrong with the hoses, it has just had a new air
>> mass
>> meter fitted because it was losing power, it has got some power back but
>> feels like there should be more, dont know where this air is escaping
>> from, it sounds like you have the windows down when accelerating, but it
>> is definatley coming from under the bonnet.
>>
Guest
Posts: n/a
Re: audi a4 whooshing noise
Did they do a full pressure test on the hoses as a visual check will not
always see any splits !
I will put money on it being a split hose.
--
Jim B
http://smogthemog.blogspot.com/
http://tinyurl.com/on3sv
"Arthur Russell" <atr1_cornell@REMOVE_CAPS_AND_INVALIDyahoo.comINVA LID>
wrote in message newsZednX1y2psuJxHYnZ2dnUVZ_oGlnZ2d@comcast.com. ..
> Well, I had a similar experience: hissing/vacuum-like noise, and some loss
> of power. If you're in the same boat, then if you read out your ECU codes,
> you will see:
> 17965 - Charge Pressure Control: Positive Deviation
> P1557 - 35-00 - -
> (note, this does not set the CEL)
>
> Cause for me was a split "vacuum" hose (but sometimes vacuum hoses are
> under pressure in these cars. The leak was near where the vacuum lines T
> off that feed the N75 boost regulation valve. This causes the boost
> pressure to spike. Once that happens, the ECU limits max boost to ~4psi to
> ensure no overboost is generated. That results in the crappy power output.
>
> For my split hose, at idle (when the "vacuum" system really is under
> vacuum), just look around a bit. My hose was split so badly it had
> collapsed, and hissing noises were pretty evident.
>
> Good luck,
> Arthur
>
> wangela13 wrote:
>> can someone please help, my car has been looked at a few times, when i
>> accelerate there is a whoosing noise coming from the front of the car, it
>> went to get fixed they said the turbo hose had burst then they said they
>> couldnt find anything wrong with the hoses, it has just had a new air
>> mass
>> meter fitted because it was losing power, it has got some power back but
>> feels like there should be more, dont know where this air is escaping
>> from, it sounds like you have the windows down when accelerating, but it
>> is definatley coming from under the bonnet.
>>
always see any splits !
I will put money on it being a split hose.
--
Jim B
http://smogthemog.blogspot.com/
http://tinyurl.com/on3sv
"Arthur Russell" <atr1_cornell@REMOVE_CAPS_AND_INVALIDyahoo.comINVA LID>
wrote in message news
ZednX1y2psuJxHYnZ2dnUVZ_oGlnZ2d@comcast.com. ..> Well, I had a similar experience: hissing/vacuum-like noise, and some loss
> of power. If you're in the same boat, then if you read out your ECU codes,
> you will see:
> 17965 - Charge Pressure Control: Positive Deviation
> P1557 - 35-00 - -
> (note, this does not set the CEL)
>
> Cause for me was a split "vacuum" hose (but sometimes vacuum hoses are
> under pressure in these cars. The leak was near where the vacuum lines T
> off that feed the N75 boost regulation valve. This causes the boost
> pressure to spike. Once that happens, the ECU limits max boost to ~4psi to
> ensure no overboost is generated. That results in the crappy power output.
>
> For my split hose, at idle (when the "vacuum" system really is under
> vacuum), just look around a bit. My hose was split so badly it had
> collapsed, and hissing noises were pretty evident.
>
> Good luck,
> Arthur
>
> wangela13 wrote:
>> can someone please help, my car has been looked at a few times, when i
>> accelerate there is a whoosing noise coming from the front of the car, it
>> went to get fixed they said the turbo hose had burst then they said they
>> couldnt find anything wrong with the hoses, it has just had a new air
>> mass
>> meter fitted because it was losing power, it has got some power back but
>> feels like there should be more, dont know where this air is escaping
>> from, it sounds like you have the windows down when accelerating, but it
>> is definatley coming from under the bonnet.
>>
Guest
Posts: n/a
Re: audi a4 whooshing noise
Did they do a full pressure test on the hoses as a visual check will not
always see any splits !
I will put money on it being a split hose.
--
Jim B
http://smogthemog.blogspot.com/
http://tinyurl.com/on3sv
"Arthur Russell" <atr1_cornell@REMOVE_CAPS_AND_INVALIDyahoo.comINVA LID>
wrote in message newsZednX1y2psuJxHYnZ2dnUVZ_oGlnZ2d@comcast.com. ..
> Well, I had a similar experience: hissing/vacuum-like noise, and some loss
> of power. If you're in the same boat, then if you read out your ECU codes,
> you will see:
> 17965 - Charge Pressure Control: Positive Deviation
> P1557 - 35-00 - -
> (note, this does not set the CEL)
>
> Cause for me was a split "vacuum" hose (but sometimes vacuum hoses are
> under pressure in these cars. The leak was near where the vacuum lines T
> off that feed the N75 boost regulation valve. This causes the boost
> pressure to spike. Once that happens, the ECU limits max boost to ~4psi to
> ensure no overboost is generated. That results in the crappy power output.
>
> For my split hose, at idle (when the "vacuum" system really is under
> vacuum), just look around a bit. My hose was split so badly it had
> collapsed, and hissing noises were pretty evident.
>
> Good luck,
> Arthur
>
> wangela13 wrote:
>> can someone please help, my car has been looked at a few times, when i
>> accelerate there is a whoosing noise coming from the front of the car, it
>> went to get fixed they said the turbo hose had burst then they said they
>> couldnt find anything wrong with the hoses, it has just had a new air
>> mass
>> meter fitted because it was losing power, it has got some power back but
>> feels like there should be more, dont know where this air is escaping
>> from, it sounds like you have the windows down when accelerating, but it
>> is definatley coming from under the bonnet.
>>
always see any splits !
I will put money on it being a split hose.
--
Jim B
http://smogthemog.blogspot.com/
http://tinyurl.com/on3sv
"Arthur Russell" <atr1_cornell@REMOVE_CAPS_AND_INVALIDyahoo.comINVA LID>
wrote in message news
ZednX1y2psuJxHYnZ2dnUVZ_oGlnZ2d@comcast.com. ..> Well, I had a similar experience: hissing/vacuum-like noise, and some loss
> of power. If you're in the same boat, then if you read out your ECU codes,
> you will see:
> 17965 - Charge Pressure Control: Positive Deviation
> P1557 - 35-00 - -
> (note, this does not set the CEL)
>
> Cause for me was a split "vacuum" hose (but sometimes vacuum hoses are
> under pressure in these cars. The leak was near where the vacuum lines T
> off that feed the N75 boost regulation valve. This causes the boost
> pressure to spike. Once that happens, the ECU limits max boost to ~4psi to
> ensure no overboost is generated. That results in the crappy power output.
>
> For my split hose, at idle (when the "vacuum" system really is under
> vacuum), just look around a bit. My hose was split so badly it had
> collapsed, and hissing noises were pretty evident.
>
> Good luck,
> Arthur
>
> wangela13 wrote:
>> can someone please help, my car has been looked at a few times, when i
>> accelerate there is a whoosing noise coming from the front of the car, it
>> went to get fixed they said the turbo hose had burst then they said they
>> couldnt find anything wrong with the hoses, it has just had a new air
>> mass
>> meter fitted because it was losing power, it has got some power back but
>> feels like there should be more, dont know where this air is escaping
>> from, it sounds like you have the windows down when accelerating, but it
>> is definatley coming from under the bonnet.
>>
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