2003 Mercury Sable Repair Question
Does replacing PCV hose correct problem
I doubt that this will be the sole cause of your problem, but it should be replaced and then further investigations can find the problem, this hose will affect engine performance so replace and get a scan done for any unresolved fault codes, start here.
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If you still haven't resolved this issue, do replace all 6 of your spark plug wires. I was having the same issue on a 98 DOHC Sable, and replacing the wires stopped an issue similar, where stopping at the toll gate caused the car to die, then restart pretty easily.
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