Re: 1993 S4 Jerk

["Stephen Bigelow" <sbigelow@sprint.ca>]

Electical, to the spark control or coil, I'll wager.

Does the tach drop as well?

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This happens while I am drving at constant speed and (so far) onlyu
when driving at more than 30 MPH. The jerk fels like I have stopped
on the brakes. It is a sharp jolt and enough to spill your coffee big
time. It matters not whether the car is constant throttle or,
accelerating.  I'm suspicious about something binding in the
driveline but there is not grinding of gears, squeal of bearings
before or after the event. When it happens there is a big "clunk"
sound and a sharp retardation of forward progress. It lasts only
a second and then everything is as before. Dealer has no clue about
this and it will *not* do it when a mechanic is present (suprise!).