Looking for Ignition Vacuum Advance

[jebudallaha]

Hey,
Anyone have an old functioning vacuum advance kicking around I could sure use it. I'm looking for the dual one that you find on the M/T (the car it's going on is an '83) with the two ports and not the three that you see on the A/T. If you have one let me know the price. Thanks.

-Aaron

[takza]

2 things you MIGHT be able to do: run with no vac advance...I still get good mpg...idle might suffer a little....timing is advanced some. Remove the "can" and grind around the outside crimp...take it apart and repair the diaphragm.

When I looked to replace them....think you needed to buy a whole new or rebuilt dist.

[garyfish]

When I looked to replace them....think you needed to buy a whole new or rebuilt dist.

I helped a friend of mine replace the vac advance on his dizzy a few months ago. He bought an aftermarket vac advance from Napa for about $62 and the only kind available had 3 vac ports.

I did mine about a year ago and got the part from Rock Auto for about $56 + shipping... but I was buying a whole bunch of other stuff from them so the shipping was no big deal. Again, mine had the 3 vac ports.

You can just plug the extra vac port you don't need, I think.

Hope this helps.

[xirdneh]

quote]

You can just plug the extra vac port you don't need, I think.

Hope this helps.

the top inside port with the very small hole (pin size) can be plugged
its for the high altitude stuff

[takza]

If you close off a port on an extra diaphram...you might keep the advance from working right?

[ARCHINSTL]

My third port (the one with the constriction) is plugged, as STL is not very high up in the mountains, so no need for the HAC valve...
No probs.
Tom M.

[Petros]

I usually check the vac advances on all the dist I find on every 3a or 4a equipped engine at the local pull-a-part. Most of them are shot, it is rare to find a good one. And it usually does not last very much longer anyway.

I am considering grinding off the swagged lip and see if I can not make a new diaframe, and find a way to make the vac advance serviceable with a removable clamp around the pie tin. It would save a lot of money in the long run, and solve the problem for all future vac advance issues.

Good luck.