Go Back  AudiForums.com > Audi Tech > General Tech
 loud rattling noise when accelerating >

loud rattling noise when accelerating

General Tech Good at troubleshooting? Have a non specific issue? Discuss general tech topics here.

loud rattling noise when accelerating

  #1  
Old 08-11-2007, 07:34 PM
1st Gear
Thread Starter
Join Date: Jun 2007
Posts: 7
Default loud rattling noise when accelerating

Hi everybody,

I have a 1.8 T engine on a Audi TT, 225 HP, 2000.

I was on the way to order a new Oxygen Sensor (see my Oxygen Sensor topic) and suddenly, in 2nd or 3rd gear instead of hearing the turbocharger noise I heard a rhythmic noise in the engine compartment, a kind of rattle or propeller noise that is touching something. I don't know if the turbocharger sound is still present or not because the new noise covers it. I suspect that the sound is produced by I broken valve.

- I can only hear the noise when accelerating, when I push hard the pedal.
- If I press the throttle gently and constant, I do not hear the noise.
- In 1st and second gear I can go above 4000-5000 rpm but in 3rd and 4th I have a lack of power; at WOT the rpm hardly grow above 3000.
- I cannot hear the noise while the car is not moving, no matter the rpm.
- I have inserted under pressure air into the admission system. I have discovered that a hose between the pressure valve and the admission tube had a small crack at one end. I have replace it. I have also discovered a exploded hose between the engine and admission - used for oil gas recirculation. I have replace it either. The noise is still there though!
- I have checked the DV. It's fine.
- There is no blue smoke coming off the exhaust, hence the turbocharger seems to be ok.

What else should I check? What can produce the noise?
 
  #2  
Old 01-21-2019, 07:49 PM
1st Gear
Join Date: Jan 2019
Posts: 1
Default

Originally Posted by flman View Post
Hi everybody,

I have a 1.8 T engine on a Audi TT, 225 HP, 2000.

I was on the way to order a new Oxygen Sensor (see my Oxygen Sensor topic) and suddenly, in 2nd or 3rd gear instead of hearing the turbocharger noise I heard a rhythmic noise in the engine compartment, a kind of rattle or propeller noise that is touching something. I don't know if the turbocharger sound is still present or not because the new noise covers it. I suspect that the sound is produced by I broken valve.

- I can only hear the noise when accelerating, when I push hard the pedal.
- If I press the throttle gently and constant, I do not hear the noise.
- In 1st and second gear I can go above 4000-5000 rpm but in 3rd and 4th I have a lack of power; at WOT the rpm hardly grow above 3000.
- I cannot hear the noise while the car is not moving, no matter the rpm.
- I have inserted under pressure air into the admission system. I have discovered that a hose between the pressure valve and the admission tube had a small crack at one end. I have replace it. I have also discovered a exploded hose between the engine and admission - used for oil gas recirculation. I have replace it either. The noise is still there though!
- I have checked the DV. It's fine.
- There is no blue smoke coming off the exhaust, hence the turbocharger seems to be ok.

What else should I check? What can produce the noise?
same problem has an one help u out yet with this
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Champagneshams
B6 Models
3
12-23-2012 11:18 AM
zygrene
Audi A3
0
11-30-2012 01:26 PM
pettijok
Audi A4
0
11-08-2007 04:33 PM
mixpix
Audi A4
2
09-25-2007 07:40 AM
dudley doright
Audi A4
8
09-02-2005 10:04 PM


Thread Tools
Search this Thread
Quick Reply: loud rattling noise when accelerating


Advertising
Featured Sponsors

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.