What's Missing from this TB42S Vac Line?

[gilly81]

Hi Guys,

Recently bought a 93 Maverick TB42S

Off the carby I've got 2 vac lines that run up to the firewall to this connector. On the other side is a vac line with a bolt in it!?

What is this and what should be connected to the other side?

cheers

http://i8.photobucket.com/albums/a44/gilly81/Maverick/photo1.jpg

[davo94]

That goes to the aac. It increases idle speed when the ac is turned on.

[Robo]

yours is automatic transmission?.
it ups the revs a little to stop the engine stalling when stopped in gear,
with air con running, engine could stall without this device
vacuum from a inlet manifold fitting, then to switch and onto aac as posted.
"a throttle nudger".
a manual transmission setup may/proberly not really need it that's why I asked.

[threedogs]

That used to be an anti pollution trick from days gone by either that or stick small ss ball in it so it look OE

[davo94]

Nope its a manual. It is 100% for the air con. When I switch mine in its pushes up the throttle.

[Robo]

Nope its a manual. It is 100% for the air con. When I switch mine in its pushes up the throttle.
Now had a 2nd look at your switch, yeah it is connected, in out at the same end for the throttle nudger, ok all good.
so where does that vac line with a screw in it lead off too?.
Asked if auto as our Mav's is a manual and never had the switch installed x factory.
the wires are still tapped up out of the way.
it only labours about 70-100rpm off idle when air cons running any way in a manual.
My mates maverick auto tranny has it fitted x factory, go figure!!