RS4 (B7 Platform) Discussion Discussion forum for the B7 Audi RS4

My cars misfire problems are finally fixed (fingers crossed)...........

Thread Tools
 
Search this Thread
 
Old 07-10-2007, 03:50 PM
  #1  
AudiWorld Senior Member
Thread Starter
 
Evil Buddha's Avatar
 
Join Date: May 2006
Location: N.O.
Posts: 1,943
Likes: 0
Received 0 Likes on 0 Posts
Default My cars misfire problems are finally fixed (fingers crossed)...........

The misfires have been as follows:
Date Cylinder#
10/07/06 # 5, 7 & 8
03/08/07 # 5, 7 & 8
04/02/07 # 5, 7 & 8
04/28/07 # 5 & 7
07/08/07 # 5 & 8

Sunday it happened again, as always it's the same scenario; I went to pass a car and down shifted from fourth to third and the engine light flashed. ****!!!! So I brought the car into the dealer and they found a sporadic operation of cam adjuster solenoids. They replaced both cam solenoids. As I said (fingers crossed).
Old 07-10-2007, 04:56 PM
  #2  
Senior Member
 
daveak05's Avatar
 
Join Date: Dec 2005
Posts: 8,364
Likes: 0
Received 0 Likes on 0 Posts
Default VVT...

had a feeling...Scott?

congrats on your repair by the way.
Old 07-10-2007, 08:17 PM
  #3  
AudiWorld Member
 
smashtheqube's Avatar
 
Join Date: Apr 2006
Posts: 426
Likes: 0
Received 0 Likes on 0 Posts
Default I had some misfires when I was at around 2500 miles...

...shut the car off while moving and started it back up again. Everything was fine.

Makes me not want to chip the car if this motor's going to have issues.
Old 07-10-2007, 08:22 PM
  #4  
AudiWorld Super User
 
RI A6's Avatar
 
Join Date: Apr 2005
Posts: 3,198
Likes: 0
Received 1 Like on 1 Post
Default Camshaft adjustment valve

Its a solenoid actuated vacuum valve that controls the variable valve positioning.

It's possible that the solenoid or valve could be sticking. Unlikely that it's electrically intermittent. If this does not fix your problem, it's the vacuum itself. In that case, make sure your shop checks out TSB 24 06 01 Sept. 22, 2006. There is a vacuum hose underneath the intake manifold that could get pinched and damaged at assembly. This was dxben's problem last year.
Old 07-10-2007, 11:50 PM
  #5  
New Member
 
Rolanday's Avatar
 
Join Date: Sep 2003
Posts: 172
Likes: 0
Received 0 Likes on 0 Posts
Default Re: Camshaft adjustment valve

"a solenoid actuated vacuum valve"?
Old 07-11-2007, 09:50 AM
  #6  
AudiWorld Super User
 
RI A6's Avatar
 
Join Date: Apr 2005
Posts: 3,198
Likes: 0
Received 1 Like on 1 Post
Default

What can I say. Audi uses vacuum to drive everything.
Old 07-11-2007, 03:59 PM
  #7  
Senior Member
 
daveak05's Avatar
 
Join Date: Dec 2005
Posts: 8,364
Likes: 0
Received 0 Likes on 0 Posts
Default how else to power engine related solenoids?

there's enough strain on the electrical system as it is. there's an available source of vacuum at engine. and 12 volt system doesn't really provide the power needs for some solenoid motors.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Sharkwood
A6 / S6 (C6 Platform) Discussion
14
02-04-2022 10:37 AM
Jesse S.
S4 / RS4 (B5 Platform) Discussion
3
02-28-2008 03:52 AM
ATMOS
Audi 4000 / Coupe GT Discussion
4
03-11-2005 07:23 AM
andysprague
Audi 5000 / 200 / V8 Discussion
1
10-07-2004 07:08 AM
JVA
TT (Mk1) Discussion
1
08-27-2003 01:35 AM



Quick Reply: My cars misfire problems are finally fixed (fingers crossed)...........



All times are GMT -8. The time now is 11:59 AM.