[Vwdiesel] smoke screw

[LBaird119 at aol.com]

In a message dated 11/7/2011 5:33:56 P.M. Pacific Standard Time,  
pila47 at yahoo.com writes:

One  question I have about all this is: did the max fuel
screw tighten up on  its' own?  Or is there some internal pump
wear that causes the fuel  delivery to increase?  Anybody have
any info about this?  TIA
Peter



You usually can't tighten them enough to get much smoke out of it,  if all 
is correct.  At this age, it could have a different pump or someone  may 
have dinked with it.  USUALLY, black smoke on an untampered with pump  means 
you have a dirty air filter, restricted exhaust or worn injectors.   If you 
drive the car really easy then you could have a lot of buildup on your  valves 
and it's time to drop to 3rd gear and go have some fun! (Italian  tune-up). 
 Carbon builds up on the intake valves and restricts air flow,  making for 
black smoke.  
  Things don't go out of adjustment so when things haven't been messed  
with, I strongly urge the owner to find the problem rather than just "fix" it 
by  turning down the fuel.
     Loren