84 4000S Quattro Questions

["Adam P. Brodeur" <AdamB@net1plus.com>]

Hello to everyone on the quattro list.  After owning 6 Saabs of various
models and being a ProRally as well as TSD enthusiast, I finally went
out and went to an Audi.  I've had the car one week and absolutely love
it.  The AWD system and handling is great.

Unfortunately, I don't know much about fixing them and seeing as I'm in
college I didn't have much cash to spend on a newer Audi.  Mine is an 84
4000 Quattro, 5 speed with 118K miles which I bought from the original
owner.  It runs good, the interior is mint but the body needs some work.
I enjoy reading the comments from everyone and have already learned alot
in one week.  

So far, I've done an oil % filter change and checked the fluids and
belts.  Everything looks good.  However, I couldn't figure out how to
get to the air filter under the fuel distributor.  Does this have to be
moved?  Also, the car stumbles a bit and ticks for a moment right after
starting it up.  Then it smooths right out.  Any ideas on that issue. 
The last question for the time being is what could cause the tachometer
to stop working?  It doesn't do anything.  Not a big deal but something
I would like to fix none the less.

Thanks in advance to everyone on the list,

Adam Brodeur