At low speed 1, 2, and 3 my 1993 swift hesitates. Also when shifting to 2 and 3 the car bucks. In any other gears it works fine. I changed the spark plugs (Bosch Platinum), Cables (Bosch), used carburator cleaner, and flushed the radiator. My timing belt is worn and stretched and I will be changing that out this week I figured that could be causing the bucking, but is my car hesitation from a clogged fuel filter, bad O2 Sensor, clogged catalytic converter, or perhaps another problem you can think of. The hesitation doesn't start until the engine is at operating temps which makes me want to condemn the O2 sensor. Thanks in advance.
-TMASTER
-TMASTER