Engine Performance problem
1992 Buick Roadmaster V8 Front Wheel Drive Automatic

The car revs then almost stalls. I've replaced the air filter, cat converter, fuel pump, and put a lit cigar in a vacume hose to try and find a vacume leak.

Is the check engin light on? You should have the computer scanned for trouble codes. Most parts stores will do it for free. To me it sounds sensor related, (iac, tps...)

Let me know what you find.

Joe