[s-cars] 20 Valve Running Rough All of a Sudden

[Matt Moly]

I'm not as much a mechanic as most of the people on
the s-car list, so bare with me. I drove my car
earlier today and it ran as well as it ever has (just
did an oil change, filled it with Mobil 1 15W-50),
then on the way home I filled it up with a fresh tank
of ultra premium gas and poured in a bottle of Chevron
Techron fuel injection cleaner, since I hadn't done
that for a very long time. I drove it home, ran fine
then, then put it in the garage for the evening. Then
at about 12 tonight I decided to take a quick drive
and when I pulled out of the driveway I noticed that
the car was very slow to rev up to the 3000 mark under
load, and felt rough and jerky up to that point, also
when it idles, it feels especially rough and vibrates
the car, almost feels like its about to stall too. It
also gives off a burning/rotten egg kind of oder as
well.
My guess is that with the fuel additive for some
reason it freed something up like a deposit, and got
it lodged in a fuel injector, so now one of the
cylenders isn't even firing.
That's my diagnosis, but I'm posting this because I
need two cents from someone who knows about these
engines. Any help would be greatly appriciated. I
would also like to know if it would hurt the engine to
drive it 5 miles to work tomorrow morning or not.
- Matt
'95 S6 Stage 1+

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