I have the 4.0 v6 and i put a new engine in it. i put the same engine in it and i got i started and its idles prett smooth with a little bog every once in a while. I would drive it and it would be boggy and the throttle would delay a little bit when i gave it a lot of gas. Then my check engine light threw me the PO171 code which is telling me that i have a leak in my Vacum system. I tried fixing the leak but it didnt seem to be affetive. Does anyone know where i could get the Vacum hosses? I need all the Vacum lines that go from the intake cover to the throttle body and into the fuel regulator. Any Ideas?

 

Just get em from an autoparts store, they make them to size. Also that kinda sounds like an lower intake gasket leak. Is it the ohv or sohc??