im havin a big problem when i driven my 240sx about a hr goes buy and the car start to has no excell it does but it doesn't at the same time like if i hold the pedle down the engine goes but the car takes about 1sec to catch up so the frist time it does it i was thinking it was the clutch but i repalced it and it still does it so i have no clue why so if yo have had this problem plez help out a brother out

thanks anthony