want to buy: TVSV

Need a car part and don't know where to get it or how to install it. Look here!
brian_wildcard
Newbie
Posts: 24
Joined: Mon Apr 13, 2009 1:50 pm
My tercel:: 1986 AE86 sr5
Location: Vancouver BC

Re: want to buy: TVSV

Post by brian_wildcard » Tue Apr 21, 2009 2:20 am

ack.. my bad
totally forgot about the color diagrams you have there

sdoan is right.. the "gas filter" takes vacuum directly from the vacuum source and passes it to the TVSV
so it does make perfect sense now why there's no vacuum...
(original vacuum line that comes from the filter is connected to the throttle positioner! :roll: for whatever reason that is)
tmr morning i will try and bypass the "gas filter" and see if it works.
helping promote the new 4ac forum, please visit:
http://4ac-powered.forumotion.com/

brian_wildcard
Newbie
Posts: 24
Joined: Mon Apr 13, 2009 1:50 pm
My tercel:: 1986 AE86 sr5
Location: Vancouver BC

Re: want to buy: TVSV

Post by brian_wildcard » Tue Apr 21, 2009 10:25 am

ok... did the changes just now
bypassed the "gas filter" and now vacuum is getting to the TVSV (thx sdoan :D )
the car didn't do it's little hesitation thingy this morning
i'll give it a few days and see how it goes 8)

guess the vacuum lines will have to stay this way till i get a new filter from toughtercel
helping promote the new 4ac forum, please visit:
http://4ac-powered.forumotion.com/

User avatar
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: want to buy: TVSV

Post by ARCHINSTL » Tue Apr 21, 2009 12:08 pm

Since I think the gas filter is an ordinary metric thread - short of getting one from a JY - you might get a threaded plug, drill hole(s) and solder in 2 (or3) tubes for the vac sources - or maybe one hole with a "tee" arrangement - although I think a JY would be a lot easier...this part is not shown on the parts link you supplied.
And - couldn't the broken port just be drilled out and an appropriately-sized tube inserted?
I note that some Canadian vehicles have two filter tubes and some have three...

I note also on the XLNT parts info link you supplied - oddly, save for the EGR info, none of the other emission paraphernalia info is supplied - nor the elusive and mystical ECU system.
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

brian_wildcard
Newbie
Posts: 24
Joined: Mon Apr 13, 2009 1:50 pm
My tercel:: 1986 AE86 sr5
Location: Vancouver BC

Re: want to buy: TVSV

Post by brian_wildcard » Tue Apr 21, 2009 3:23 pm

yes i have thought about having the "tee" arrangement with the remaining good port on the filter
my vacuum lines i have are not long enough, gotta grab some from lordco

performance wise, only problem i've noticed so far is that the speedometer wobbles at speeds below 50km/h, works fine at speeds above that.
searched online... they say it's the speedo cable dying/drying up
i don't know much about how the speedometer works.. but this only happened after the TVSV became functional..
problem didn't exist when vacuum lines were messed up

gotta go back to reading the manual :P

p.s. yeah, it's a shame they don't have those parts covered... nonetheless, i'm really impressed with their website's user interface
helping promote the new 4ac forum, please visit:
http://4ac-powered.forumotion.com/

Luck768
Newbie
Posts: 1
Joined: Wed May 13, 2009 5:24 am

Re: want to buy: TVSV

Post by Luck768 » Wed May 13, 2009 5:31 am

Hi guys,
I am a little confused speaking of TVSV.,Can you add more details regarding this topic.,? Can you?


_________________
Furnace Filter

User avatar
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: want to buy: TVSV

Post by ARCHINSTL » Wed May 13, 2009 3:33 pm

Luck768 -
Welcome to the Club!
The TVSV is the Thermostatic Vacuum Switching Valve, which is the short black plastic "tree" on the water outlet at the front of the head - easily broken, but necessary for smooth running of the OE emission/fuel system.
Not to be brusque, but a Search here for "TVSV" reveals http://www.tercel4wd.com/forums/search. ... mit=Search
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

User avatar
Petros
Highest Ranking Member
Posts: 11318
Joined: Sun Jan 28, 2007 6:31 pm
My tercel:: '84 Tercel4wd w/extensive mods
Location: Arlington WA USA

Not want to buy: TVSV

Post by Petros » Wed May 13, 2009 6:41 pm

There should be no relationship with the speedo and the TVSV, unless the Canadian version does something very different from any car I have ever seen.

More likely the cable is wearing out and it was a coincidence. You can raise the car and remove the speedo cable housing from the trans end, pull the cable out and lube it real good with light graphite grease or lithium lube. Than reinstall it, keep it out of the dirt! This should eliminate the bouncing. IF not it means cable is worn out and may eventually break, than you can replace it with one from a wrecking yard.

Good luck
'87 Tercel 4wd SR5 (current engine swap project)
'84 Tercel 4wd (daily driver, with on going mods)
'92 Mazda MPV 4wd (wife's daily driver)
'85 Tercel 4wd DLX auto(daughter's daily driver)
'01 Honda Civic (other daughter's daily driver)

KootenayCadillac4wd
Newbie
Posts: 4
Joined: Sun Oct 05, 2014 5:19 pm
My tercel:: 86' 4wd Manual

Re: want to buy: TVSV

Post by KootenayCadillac4wd » Mon Oct 06, 2014 12:19 am

Any good sources to purchase a new TVSV from? or a good alternative? Toyota is asking for $320!

User avatar
irowiki
Highest Ranking Member
Posts: 3377
Joined: Tue Apr 02, 2013 10:02 am
Location: Farmington, NM

Re: want to buy: TVSV

Post by irowiki » Mon Oct 06, 2014 8:52 am

Nope. Your best bet is either a new toyota valve, or try testing junk yard ones. (or get a weber!)
Former Tercel Enthusiast (not a practical family car anymore but they still have a place in my heart)

Site administrator, if something is broken, PM me!

81 Coachmen RV, 70k miles
95 Camry Wagon, 153k miles
04 Camry Sedan, 250k miles

User avatar
Petros
Highest Ranking Member
Posts: 11318
Joined: Sun Jan 28, 2007 6:31 pm
My tercel:: '84 Tercel4wd w/extensive mods
Location: Arlington WA USA

Re: want to buy: TVSV

Post by Petros » Mon Oct 06, 2014 12:36 pm

they do show up on ebay, partsgeek.com, perhaps rockauto, everyone once in a while for cheap. might just google the part number and see what comes up.
'87 Tercel 4wd SR5 (current engine swap project)
'84 Tercel 4wd (daily driver, with on going mods)
'92 Mazda MPV 4wd (wife's daily driver)
'85 Tercel 4wd DLX auto(daughter's daily driver)
'01 Honda Civic (other daughter's daily driver)

User avatar
rer233
Highest Ranking Member
Posts: 918
Joined: Sat Jan 01, 2011 1:49 pm
My tercel:: Multiple

Re: want to buy: TVSV

Post by rer233 » Mon Oct 06, 2014 7:06 pm

Been meaning to post this for sometime now-guess this is a good time. A year and a half ago i came up with an alternative to the TVSV. I got an MB vac switchover valve (pn 0015407097) mounted it on the right side innerfender well, hooked up the vac lines from TVSV to it and wired it to an illuminated mini rocker switch which i located in the "dummy" switch filler piece in the inst. cluster hood (below the rear defogger switch.) With a little careful D&D (drill and dremel) work the switch looks real good, and lights up amber in the "cold" mode- kinda like a hand choke. The switch was made by GC electronics- pn 35-662. It's worked real well for me, and i did the same thing to my "new" '87 2wd a/t wagon.
if it aint there, there's a good chance it won't break!
83 SR5 Silver/Blue (Snowmobile/work beater)-totaled but drivable
85 SR5 Blue
88 SR5 White (the 'good' one)-not anymore-totaled
87 fwd silver wagon a/t
87 4wd dx Cream (a/t- not anymore- now m/t)

User avatar
dlb
Highest Ranking Member
Posts: 6573
Joined: Mon Jul 06, 2009 9:03 pm
My tercel:: none currently, 7 previous
Location: shawnigan lake, bc, canada

Re: want to buy: TVSV

Post by dlb » Mon Oct 06, 2014 7:09 pm

rich, can you post pics of your DIY setup? i'm really curious.

User avatar
rer233
Highest Ranking Member
Posts: 918
Joined: Sat Jan 01, 2011 1:49 pm
My tercel:: Multiple

Re: want to buy: TVSV

Post by rer233 » Sat Feb 20, 2016 4:34 pm

see below for pics
You do not have the required permissions to view the files attached to this post.
if it aint there, there's a good chance it won't break!
83 SR5 Silver/Blue (Snowmobile/work beater)-totaled but drivable
85 SR5 Blue
88 SR5 White (the 'good' one)-not anymore-totaled
87 fwd silver wagon a/t
87 4wd dx Cream (a/t- not anymore- now m/t)

User avatar
rer233
Highest Ranking Member
Posts: 918
Joined: Sat Jan 01, 2011 1:49 pm
My tercel:: Multiple

Re: want to buy: TVSV

Post by rer233 » Sat Feb 20, 2016 8:18 pm

OK- Now it's time for me to explain the pics...

#1- disconnected lines @ TVSV and installed tee.
#2- blurry pic of installed vac valve (screw driver blade pointing to valve.)
#3- pic of switch and modified dummy switch filler.
#4- another view of #3.
#5&6- hood installation.
#7- pic of vacuum valve with numbered ports.

Vacuum lines were connected as follows-
Line from gas filter to port#3
Line from AAP to port #2.
Lines that went to TVSV L&M teed together and connected to port #1.
Just left the line connected to the TVSV J port where it was (vent?)

This setup has worked real well for me on two cars- cheap solution to an expensive ($320) problem.
Found plenty of the switchover valves on early '90's MB's in the boneyard.

Hope this helps, Rich.
if it aint there, there's a good chance it won't break!
83 SR5 Silver/Blue (Snowmobile/work beater)-totaled but drivable
85 SR5 Blue
88 SR5 White (the 'good' one)-not anymore-totaled
87 fwd silver wagon a/t
87 4wd dx Cream (a/t- not anymore- now m/t)

Post Reply