1991 Oldsmobile Cutlass bogs sputters and dies

Check the catalytic converter to make sure it is not “plugged” or restricted. To test for a plugged converter, drill a small hole in the exhaust pipe right before the catalytic converter. Install a temporary hose fitting and attach a long rubber hose and a 0 to 10 pound pressure gauge. With the gauge inside the car, drive up a hill or accelerate and read the pressure. Normal is two to three pounds, restricted four pounds or higher. The drawback to this method is the small hole will need to be welded shut after the test; a minor job if you have a welder.