[s-cars] Miss & whoosh

[Michael Bess]

OK diagnosticians; put you thinking caps on.

 

Patient: '95S6 w/MTM 1+ and RS2 EM

 

Symptoms: Started out as a minor stumble during acceleration under boost.
Now I can hear a distinct "whooshing" sound while driving with boost
obviously building under peddle to metal conditions, from 2500 rpm onward,
which seems to come from the passenger side of the car, near the glove box
area.  When whooshing is evident, car stumbles quite badly, black smoke seen
in rear view mirror (Over-rich condition?).  If bring revs up with partial
throttle only (no boost?), no such problems all the way up to 6000 rpm.

 

WTF???  

 

Possibilities:

Blown off hose from ECU pressure sensor?

Bad coil, POS, plug?

Split in hose in intake tract?  (BTW how can I easily pressure test things;
I remember seeing something a year or so ago?)

???

 

TIA,

 

Mike Bess