what vacuum lines go to the back vacuum nipple on the back of the manifold and what is the second line that goes to the throttle body .i know one has to be the map sensor . help please wife is driving me nuts to get it going .thanx for you help guys

 

opps it is an 88 4.0

 

For the MAP sensor it should come right off the throttle body feeding right to the MAP. But not 100% thats how it is on my96

 

^ same on '90

 

The one on the throttle body is for the map sensor and I'm not sure if I'm thinking of the same one on the back but out could be the ccv exhaust tube.
A pic pic the one on the manifold would help if you could post it

 

Does this help any?

 

i do have this , the throttle body has a place for 2 vac connections 1 is the map sensor but is there a second vac line that gets connected right above the the map sensor line ? and is there any connection to the vac sourse on the back of the manifold .? the diagram doesnt show any thing .is that correct ????/

 

on the diagram it is the one marked vac fitting .

 

can u post a pic of what u need identified?
then i will try to help look it up