quattro digest, Vol 1 #1326 - 16 msgs

[texactii at csonline.net]

RE: hesitation

From: "Bill Rowe" <browe58 at netzero.net>
(snip)
 Once it gets going it will on
occasion hesitate
upon acceleration.  As time goes on it happens more frequently
even after
fully warmed.  Tried the following w/ no progress:

1.  inspected and cleaned distrib cap and rotor
2.  replaced 02 sensor.  replaced temp sensor
4.  replaced WOT switch
5.  Plugs and wires have less than 10k miles on em
6.  fuel filter has less than 10k miles on it
7.  PO replaced fuel pump, injectors, accumulator less than 20k
miles ago
and had car set to specs
8. replaced fuel pump relay
9. checked power to WOT switch connector

What have I overlooked?
(snip)
I had a similiar experience on my '83 5000T(non-quattro). 
Changed coil since found to be breaking down under heat.  
Also was directed to change Hall unit (did this before changing
coil, but problem still there).  Hope this helps.  Tex.