Nissan Repair: emmissions controls digram, vacuum hose, car jumps

Question
i have  a240 sx niissian 1990, i need the digram for the airflow, and emmisions or  a digam the vacum hose digram.when driving on freeway car jumps and the rpms are higher , sounds   like it's not changing gears ,but it is  

Answer
Sheila,

The vacuum hose routing sticker is under the hood.  If the hood has been replaced you are going to have to look for antoerh car of the same year or go to the nissanusa.com website and download the appropriate information.  If the car is skip shifting and it is an automatic then I would be looking at the fluid to see if it is burnt.  You have a torque converter that is going out or the pump has losted pressure and the clutches and bands are slipping.