[s-cars] Need Diagnostic Help

[Krasusky Paul (WQQ2PXK)]

Bob pleaded:

From: "Bob Rossato" <bob.rossato at att.net>
Subject: [s-cars] Need Diagnostic Help
To: "S-Car-List" <s-car-list at audifans.com>

A friend of mine is having some intermittent cutoff problems on his S4.
It happens during wide open throttle.  He states that it is not like a
misfire, it's more like a hard cutoff such as hitting the rev limiter,
though he's nowhere near the rev limit.  Has happened a handful of times
over the last few weeks.  When it's not acting up it pulls strongly, so
I wouldn't suspect the usual ECU boost line coming off as it wouldn't
reseal it self.  And besides, he's adamant that it's not just a loss of
boost, it's a complete loss of power.  Again, only during WOT.  Ease off
on the throttle and the engine comes back.  I also wouldn't suspect the
POS or coils as I would expect that to be more of a misfire, not a
complete loss of power.  

Is this an indication of a problem with the WGFV?  We
will be checking the line to the ECU and water trap, as well as boost
hoses anyway just to make sure.  Any other thoughts? 

The car is a '94 S4 with ~53k miles.  Completely stock.  And let's see,
what else... oh yeah, it's Pearl White if that helps.

Bob






Well Bob, sounds like Biz is having some issues.  *I* have not driven HIS
car so you cannot blame me.  How about plugs and boots?  Swap yours in while
your at it for giggles.  Mine did similar when it needed plugs, though more
of a cut out than a complete loss of power...

Good luck, let us know of course.

-Paul I didn't do it, for once, K.
CT