S6 "sputtering" puzzle

[Ado Sigal]

Things point towards manifold pressure transducer, or its connecting 
hose. Mind you, faulty transducer should produce codes. Other cause 
could be loose clamp on exhaust M to WG hose, although this usually 
produces cut out rather than just spluttering, but it gives no codes. If 
you haven't already, frequency valve circuit should be also checked.

Good luck,

Ado


>
>On Mar 11, 2007, at 6:26 PM, DGraber460 at aol.com wrote:
>
>My 95 URS6 has been demonstrating some strange behavior that I cannot
>diagnose.
>Back in December my Inter-cooler sprung a leak. It was relatively easy 
>to
>find the problem with a pressure test and I replaced it thinking I had 
>cured its
> ills.
>About then we started to accumulate snow that finally stopped  
>somewhere
>between 70-80 inches total. The roads were so packed and rough that we 
> broke the
>oil pan on our A6 dropping on all the unavoidable holes  etc.
>Anyway, now that the roads are passable I find the car  still 
>"sputters" at
>WOT and full boost. It doesn't buck or cut out it just  sputters. If I 
>peddle
>it to maintain below 17 it pulls like a train. Go to  WOT and 20 or 
>above PSI
>and she sputters badly. Prior to all this it was  running 27 full 
>boost very
>nicely.
>I have pressure checked it twice with a stethoscope very methodically  
>and it
>holds pressure even after I take the regulator off. It also  blinks no 
>codes.
>Any usual culprits for such misbehavior?
>Any advice greatly appreciated.
>TIA
>
>Dennis
>Denver
>
>  
>
>  
>