reldla1996

The fitting on the oil filler tube should be connected with a rubber hose to the similar size fitting on the throttle body that you circled (which should be drawing a vacuum). The two smaller fittings on the EGR spacer originally went to coolant lines on the intake. If you're running EGR gases to your EGR spacer, the coolant helps cool down the intake, but it's not critical to have them connected.

mjr46

is there a vac line going to the map that is connected to the intake?? if so, next step would be to pull the ecm and check the code on the ecm to see if it is a SD ecm, if it is a ecm for a maf, then you bought the car from a retarded hack.

mgmuscari

The things that are circled:

On throttle body: Breather tube for the PCV system. This connects to the fitting on the oil filler neck. The valve cover pulls air from here to ventilate the crankcase. The PCV valve on the rear of the lower intake should be connected to a vacuum source on the upper intake.

On EGR spacer: Intake air heating hoses. These run to the heater pipes on the lower intake. If they're disconnected and you aren't pouring coolant all over your engine, then the previous owner blocked those off. They are pretty much useless.

Near the air filter: Hard to see, but if it's a disconnected "vacuum" hose then it's either part of the canister purge system or the AIR pump. Either way, not essential to making the car run well. The former keeps the fuel tank unpressurized by condensing fuel vapors in the carbon canister, and purging to the intake through a solenoid operated check valve under certain conditions. You might get *slightly* increased fuel economy by hooking this up, and if you notice fuel smells in the engine compartment on hot days it's probably because this thing is bad. On my old engine, the canister purge hose was actually burned through at some point before I got the car by the exhaust header... I'm glad it didn't burn to the ground.

You need to determine whether your car has been properly retrofitted to SD like MJR said. It's quite likely... mine looked a lot like this when I got it. Basically you just need to check the computer part number (inside passenger side right kick panel) and ensure that it's connected to the MAP sensor on the firewall, and that the MAP sensor is connected to manifold vacuum.

jst98gtmustang

Ok.thanks for the help.ill look tonight when i get home and see what i can find out.

jst98gtmustang

I think there is a hose running from that map.

jst98gtmustang

got a pic today.is that the map sensor? there a hose running to manifold on the back side from that thing next to the map sensor.