83 wagon Vacuum diagram/vacuum advance

Jts · Post by **Jts** » Sat Nov 25, 2006 6:55 pm

Hi guys. As some of you know, I just got an 83 wagon sr5. I lucked out and got a fully functioning vacuum advance at the jy yesterday. I put it in and it still wouldn't work (but the original was definetly broken). Turns out i had a vacuum leak in my Choke breaker (CB in the manual). I bypassed the CB and now my vac advance works. However, theres this part called a gas filter that is screwed into the intake manifold. In the 85 FSM, this gas filter (which supplies vacuum to the vac advance) has 2 lines to it. Mine only has one. Can someone with an 83 manual tell me if thats the way its supposed to be? Or is it some random part installed by the PO. A scan of the 3-AC vac diagram for 1983 would help me immensely

Also, does anyone know if the system will function alright with the CB bypassed. THe manual states that it opens the choke to prevent a rich mixture. It would seem that the choke opens itself without the need of this. Can anyone tell me if this would cause problems?

Btw, with my vacuum advance working, my stumble/hestitation from 1/4 to 3/4 throttle is almost completely gone. If anyone has a known bad vacuum advance and is experiencing the engine cutting out at mid throttle positions, it seems that a broken vacuum advance can be completely responsible for it.

Lollypop · Post by **Lollypop** » Sun Nov 26, 2006 12:04 am

I have a question along this same line...

There are three nipples on the vac advance (if I'm right) one is for advance, one to bring back to nuetral, and what is the third nipple for? There is one high on the canister one in the middle and one on the bottom which is which? as far as which does what?

=====Jusdtin=====

Jts · Post by **Jts** » Mon Nov 27, 2006 3:18 am

I'm not sure, but i've read on the forum it could be for high altitude compensator.