I recently swapped motors in my 240sx and now that i put this one in its feeling sluggish.. it runs/ drives but feels like it only has 3/4 the power.. i checked the vacuum lines and i think I have them hooked up in all the right places.. some one said it might be the ecu but the ecu in it is brand new.. some one please help me.. thanks. This is a SOHC by the way.