stalls at stop sign on 1998 Cadillac Seville STS

stalls at stop sign starts right up runns great just stalls when stopped.

Asked by for the 1998 Cadillac Seville STS
Check for air leaks, vacuum leaks at the engine for starters. A good performance diagnosis is in order to help determine further cause.
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Had same problem on a VW Beatle..turned out to be a Crank Sensor..... after i replaced that it ran Normal again.... Get it Code tested & look up ..Thats what i did. Did all work myself..cost about $100.00 for it though.
Typically crank or cam sensors fail and then have a hard time restarting right away. Anything can happen, though, of course. That's why the diagnosis is so urgent.