On my 1991 Ford Taurus GL I hear a whining noise when I press the gas pedal and the car does not accelerate until I raise my foot off the pedal then it sort of jerks and then accelerates. This is after being told I needed catalytic converters and EGR valve sensor replaced. Can you help me?
New catalytic converters and EGR valve sensor
To me it sounds like a transmission issue. Check your transmission fluid level with the engine running , in park, and on a flat surface. The issue you are describing is what happens when the trans fluid level is low. If the fluid is dark in color or has a burnt smell you may have burnt the internal clutches and this will require a rebuild on the transmission.