vacuum question

[noslow1986]

ok under the manifold there are vacuum ports. i plug the two in front of the manifold going towards the front end of the car. now behind the manifold im using that. what are the two that i plug what are they are what do they do. i dont have any emissions, or that canister for the fuel if the car tips over its. i also pluged the the vacuum line that goes go the map sensor, but i left the port open likes its reading bap cause i swith to mass air. now auto zone told me there is no differances between 86 sensors and 91 sensors is this true

 

[TENGRAM]

ok under the manifold there are vacuum ports. i plug the two in front of the manifold going towards the front end of the car. now behind the manifold im using that. what are the two that i plug what are they are what do they do. i dont have any emissions, or that canister for the fuel if the car tips over its. i also pluged the the vacuum line that goes go the map sensor, but i left the port open likes its reading bap cause i swith to mass air. now auto zone told me there is no differances between 86 sensors and 91 sensors is this true

one of the two in the front is unused (usually loops back to another vac port under the intake). the other one is for the charcoal canister. there is no difference between a MAP and a BP sensor, except for how you hook them up...you did it right.

 

[noslow1986]

great thats what i wanted to know thanks

 

[v8only]

in the back, one goes to the vacuum tree on the firewall for the brake booster, one goes to the fuel pressure regulator, and one goes to the MAP ( or in your case not to the MAP) one goes also to the tab/tad/egr solonoids, and one goes to the pcv valve.

on the front, one goes to the charcoal canister.

 

[jrichker]

Diagram courtesy of Tmoss & Stang&2birds

See the following website for some help from Tmoss (diagram designer) & Stang&2Birds (website host) for help on 88-95 wiring http://www.veryuseful.com/mustang/tech/engine/

http://www.veryuseful.com/mustang/tech/engine/images/IgnitionSwitchWiring.gif

http://www.veryuseful.com/mustang/tech/engine/images/fuel-alt-links-ign-ac.gif

http://www.veryuseful.com/mustang/tech/engine/images/88-91_5.0_EEC_Wiring_Diagram.gif