What is this vacuum switch valve ?
What is this vacuum switch valve ?
On my 1985 California 4WD Wagon, there is a 3-way vacuum switch valve (with two vacuum hoses and an atmospheric port with a filter) , located right next to the two vacuum switches (A) and (B). It isn't the EVAP system VSV. As far as I can tell it isn't on the vacuum diagram in the repair manual. It seems to be connected with this set of vacuum diaphragm valves underneath the carburetor, which I see described nowhere either. Does anyone know what it is, and where I could find a description of it?
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ARCHINSTL
- Goldie Forever
- Posts: 6369
- Joined: Sat Apr 30, 2005 1:52 pm
- My tercel:: Goldie is a 1986 SR5 attualmente con Weber/also owned the first T4WD in STL in late '82
- Location: Kirkwood, a 'burb of St. Louis
Re: What is this vacuum switch valve ?
Welcome to the Club!
It's the idle-up switch for the AC system. It should be on your under-hood sticker.
It is not on the emissions diagrams because it is not part of that system - it took me a while to figure it out, too.
Look on page AC-40 of the FSM available here.
Oddly, it is not covered in the AC section in the otherwise XLNT AutoZone site's Tercel Repair Guide.
Here is also an interesting thread, albeit more than you requested: http://www.tercel4wd.com/forums/viewtop ... dle#p29310
Tom M.
It's the idle-up switch for the AC system. It should be on your under-hood sticker.
It is not on the emissions diagrams because it is not part of that system - it took me a while to figure it out, too.
Look on page AC-40 of the FSM available here.
Oddly, it is not covered in the AC section in the otherwise XLNT AutoZone site's Tercel Repair Guide.
Here is also an interesting thread, albeit more than you requested: http://www.tercel4wd.com/forums/viewtop ... dle#p29310
Tom M.
T4WD augury?
"Oh, do not ask, 'What is it?' Let us go and make our visit."
T.S. Eliot - "The Love Song of J. Alfred Prufrock"
"Now and then we had a hope that, if we lived and were good, God would permit us to be pirates."
Mark Twain
"Oh, do not ask, 'What is it?' Let us go and make our visit."
T.S. Eliot - "The Love Song of J. Alfred Prufrock"
"Now and then we had a hope that, if we lived and were good, God would permit us to be pirates."
Mark Twain