Acceleration Problem

This problem started today as I was coming home from work. Car seems to idle fine, and slow acceleration seems ok, but when I try to accel quicker the car seems to hesitate, it feel like the car just went on dirt road. Last year I had the car hesitate around 5th gear, but after changing the skarp plugs it went away, those were rough, like a misfire, these hesitations are light, so I don't think they are misfires of the tranny slipping, or the tourque converter. Is there anything else it could be? Ohh, and these start around 3rd gear, driving like 30 km/h.

Install a new fuel filter and check the air filter. Pull the vacuum line to the pressure regulator if you find gas replace. Then check fuel pressure. If this is ok ohm your plug wires and check plugs for indications of misfire. If this doesn't work tell us.