B5 Models Please discuss all 1996 - 2001 B5 A4 topics here...

2.8L 30v question

Thread Tools
 
Search this Thread
 
Old Jan 11, 2013 | 09:39 PM
  #1  
01 Avant's Avatar
Thread Starter
|
1st Gear
Joined: Jan 2013
Posts: 212
Default 2.8L 30v question

I just got this car and was wondering if anyone else had a roughness in the rpms after 4k - its smooth until it gets into the higher rpms
 
Old Jan 11, 2013 | 09:56 PM
  #2  
mtroxel's Avatar
2nd Gear
Joined: May 2012
Posts: 1,272
From: Minnesota
Default

Mine is smooth all the way through the tach.
 
Old Jan 11, 2013 | 10:02 PM
  #3  
01 Avant's Avatar
Thread Starter
|
1st Gear
Joined: Jan 2013
Posts: 212
Default

thinking then my balancer is taking a poop
 
Old Jan 11, 2013 | 10:03 PM
  #4  
mtroxel's Avatar
2nd Gear
Joined: May 2012
Posts: 1,272
From: Minnesota
Default

Balancer?
 
Old Jan 11, 2013 | 10:09 PM
  #5  
01 Avant's Avatar
Thread Starter
|
1st Gear
Joined: Jan 2013
Posts: 212
Default

the harmonic balancer

i.e. crankshaft pulley
 
Old Jan 11, 2013 | 10:12 PM
  #6  
bshusted's Avatar
2nd Gear
Joined: Jul 2011
Posts: 843
From: Kirkland, WA
Default

Are you sure it's not misfiring? What condition are the plugs in?
 
Old Jan 11, 2013 | 10:22 PM
  #7  
01 Avant's Avatar
Thread Starter
|
1st Gear
Joined: Jan 2013
Posts: 212
Default

just put new plugs and wires in. i did feel a slight stumble at idle but no codes are being thrown. - i have a new coil on the bench i can pop in to rule that out

if you rev it in neutral, shes all butter which after reading what i wrote makes me now rule out the pulley
 
Old Jan 11, 2013 | 10:22 PM
  #8  
mtroxel's Avatar
2nd Gear
Joined: May 2012
Posts: 1,272
From: Minnesota
Default

+1 At 4K RPM you gotta wonder if it's missing.
 
Old Jan 11, 2013 | 10:24 PM
  #9  
mtroxel's Avatar
2nd Gear
Joined: May 2012
Posts: 1,272
From: Minnesota
Default

No CEL? Have access to VAG-COM? It's very good at showing misfires.
 
Old Jan 11, 2013 | 10:30 PM
  #10  
01 Avant's Avatar
Thread Starter
|
1st Gear
Joined: Jan 2013
Posts: 212
Default

i do and will check that.

it revs fine in park but has a vibration under load
 



All times are GMT -4. The time now is 04:06 AM.