[s-cars] Engine issue (93 S4)

[Martin, Gary G]

I guess the first thing I would do is to start the engine, and disconnect
one injector connector at a time. If you remove one and the engine doesn't
run any rougher, you have a problem with that cylinder. From there it could
be anything from the plug to the POS (power output stage) or fuel injector.
POS are known to fail (BTDT) and by swapping them will isolate the problem.

Gary
94 UrS4
91 200 TQA

-----Original Message-----
From: Charlie Nilsson [mailto:charlienilsson at yahoo.com]
Sent: Tuesday, August 27, 2002 9:55 AM
To: s-car-list at audifans.com
Subject: [s-cars] Engine issue (93 S4)


--
[ Picked text/plain from multipart/alternative ]

Hi all -

I'm having an issue which just appeared out of the blue last night...  While
driving home, my engine suddenly started to miss and power went away (almost
40%).  The engine now gives a repeated bumble bumle bumble and the whole car
shakes a bit violently.  Sadly, I'm hoping to sell the car this weekend, and
am a little frustrated that the car has to do this to me at the last minute
=)  Any suggestions on what might cause this?

The turbo sounds fine, but the engine sure is making a lot of vibration
(which goes away for awhile if the car sits, and then comes back
unexpectedly after a short drive, along with the reduction in power).  I do
notice that the engine compartment is more hot than usual, and there is more
of a heat smell from the compartment.  The bumble bumble is pretty
consistent at idle, and continues up the power curve (even though power is
really reduced).

Another thing I notice is that when I turn on the ignition, I don't hear the
normal sounds that the engine makes when preparing to start.  (and I have no
clue what that buzzing noise should be doing).  When I turn the key on
halfway, the car is dead silent - nothing except for the dash vents.

Any suggestions would be extremely helpful.

Thanks, Charlie



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