1990 Volvo 240

Engine Performance problem
1990 Volvo 240 4 cyl Front Wheel Drive Automatic

I have trouble getting the car to idle. I have to keep patting the gas to keep it running until it can idle. While idling, it sputters like it's fighting to get gas or to much air. While driving, it still sputters like crazy. I can't get the car to go pass 50 mph and when it gets to 50, it just goes slower and slower. I was told to get the catalina converter taken off, change the oxygen sensor all kinds of stuff. Please help?
December 12, 2008.

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