wildstar1063

Where can I get a Vacuum Advance unit for my 85 12a?

Autozone and O'Reillies here in OKC both say the don't stock them,
and can't order them. and I didn't see them in the Victoria British/ Black Dragon
catalog.

Thanks

Chuck E.

trochoid

iTrader: (6)

Grab a spare dizzy from the recyclers.

vipernicus42

iTrader: (4)

Amazingly enough I remember seeing this in a completely unrelated thread which I archived last week:

https://www.rx7club.com/showthread.p...ht=vac+advance

Read the whole thing on how vac advance works, and he gives you a part number for a good vac advance diaphragm that can be bought at your local NAPA

Jon

novaboy009

I love that post.... saved in numerous files on several of my computers and posted across a stunning variety of message boards.

If anyone says "ditch the VA," you're wrong.

Kev

wildstar1063

Jon,

That is a pretty great description of advance and timing, however it seems specifically
geared to GM products. I typed in the part number on Google and got that same article on several GM forums. My guess is that the part number given will work only with a GM dizzy.

Does no one make NEW replacement vacuum advance units for the Gen 1 RX-7's?
I do not want to get a used one, it might just go out too.

I called Autozone, O'Reilly, and checked NAPA online with no luck. I guess monday
I'll have to call the local Mazda dealership and see if they have one.

Chuck E.

trochoid

iTrader: (6)

Vacuum units rarely go out The way Mazda packages many of thier replacement parts, you may need to buy the entire dizzy. If it was me, I would test the vacuum unit and make sure that it has failed and the problem is not a vacuum leak some where.

wildstar1063

I hooked it to a a long rubber hose and put some suction on it, and
the vacuum unit did not move, and the suction would not hold. I checked the second one and it worked just fine. It appears the diaphram is broken in one of the
advance units

Chuck E.