1988 Audi 90 Quattro

[Stephen Bigelow]

> Help, please!  My Audi has an awful problem - it is intermittently losing
power, sometimes just
> lurching (the tach drops to zero then bounces back up) and continuing on
with power; and
> sometimes totally losing power and leaving me stranded.

Tach dropping to zero indicates a loss of juice to the coil.
VERY carefully check connections at coil, spark modules and Hall sender.

BTDT. Infuriating, isn't it?