Car choking, Gas pedal stiff, Check engine + vtm-4 light

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After driving car for 5-10 min car would chock (most of time), RPM drop 2000 and speed 20-25 Miles/hr. No trany slippage. gas pedal feel stiff (resistance) codes: P0132, P0172 and had once P0705 + VTM-4 light on Changed Catalytic Converter + O sensor Car would rev perfectly well in Park/Neutral