Tvis cleaning/function

Franken_Hachi
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Tvis cleaning/function

Postby Franken_Hachi » Fri Mar 08, 2019 8:10 am

I have a stock 1985 Corolla gt-s and below 4500 rpm the engine is not reving like it used to before being in storage. I know the tvis opens the butterflies @ 4200 +/-.
The link for tvis in faq isn't working, so does any one have any advice on cleaning, repair, and testing?
1985 Corolla GT-S
2007 Camry (daily)
1994 Jeep Wrangler (lifted and stuff)
MECP Certified Installer
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totta crolla
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Location: Oxford U.K

Re: Tvis cleaning/function

Postby totta crolla » Fri Mar 08, 2019 9:46 am

To test you can unplug the wiring connector from the TVIS this should keep the TVIS plates fully open all of the time.

Franken_Hachi
Club4AG Regular
Posts: 30
Joined: Thu Nov 08, 2018 5:54 pm

Re: Tvis cleaning/function

Postby Franken_Hachi » Tue Mar 12, 2019 6:02 am

Yup, it acts exactly the same with it unplugged. I need to pull it and test the diaphragm.
1985 Corolla GT-S
2007 Camry (daily)
1994 Jeep Wrangler (lifted and stuff)
MECP Certified Installer
Insta: @franken_hachi

UNLIMITED 86
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Location: 619

Re: Tvis cleaning/function

Postby UNLIMITED 86 » Wed Mar 13, 2019 5:20 am

Get some Seafoam (or Motul if you're a baller) and draw it through the throttle body. If your TVIS butterflies are sticking, this should help free them up without having to take anything apart.

Also, Jondee had some good advice about checking the vacuum lines. Check your water pump post.
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