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Q:

two cylinders not fireing,what could be the problem on 1992 Oldsmobile Cutlass Supreme

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checked spark on plugs two cylinders not fireing
(3) Answers
AS USUAL NO ENGINE DATA! HOWEVER I THINK EITHER V/6 HAS THREE COILS TWO WIRES EACH. ARE THE TWO CYLS. WITH NO SPARK ON THE SAME COIL? IF SO MOST LIKELY THAT COIL IS YOUR PROBLEM. IF NOT ON SAME COIL COULD BE PLUG WIRES OR IGNITION MODULE.
BE CAREFUL NOT TO GET PLUG WIRES HOOKED UP WRONG!! THAT IS VERY EASY TO DO.
you either got a bad coil or module
if you have two cylinders not firing on this vehicle...possible bad coil or wiring.