SOURCE: 2001 buick regal gs 3.8L
Sounds like a plugged catylic convertor. You might check with a GM dealer to make sure if it falls in the Special Policy coverage to get it replaced under warrenty, it has to have less than 120,000 miles on it though.
SOURCE: MISSING DURING ACCELERATION
This could be many things like socket said also possibly fuel pump issues or a bad pcv valve. Im leaning towards a fuel pump problem
SOURCE: multiple random miss fire
Now change the distributor. Get one from salvage or e-bay. Did the timing belt jumped a tooth or is it new. Vitally
SOURCE: car starts to cough and splutter at low revs,cuts out when stops
Check the spark plugs, cap and rotor.
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