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mystery vacuum hose
#784797 November 06th 2021 6:38 pm
Joined: Jan 2021
Posts: 37
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Ok, so my vacuum sticker is scratched right where I need to see where this mystery hose goes....

95 Chevy g20 350

Hopefully this photo upload works...

Attached Files PXL_20211106_223540036.jpg
Re: mystery vacuum hose
Brother kitten #784799 November 06th 2021 7:30 pm
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carpal tunnel
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carpal tunnel
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There are two vacuum solenoids. One for the evap can purge and one for the EGR valve.

The evap can purge solenoid will have only two connections. From the TBI and to the evap can. (I'd bet this is it but it's hard to tell for sure).

The EGR solenoid will have two connections and a vent. The vent usually has a small cube foam filter stuck on it to keep dirt out of the valve. The little foam filter is about 3/8" square. Sometimes people will block or plug that vent in a mistaken attempt to disable the EGR.

My2%

Last edited by CatFish; November 06th 2021 7:37 pm.
Re: mystery vacuum hose
CatFish #784805 November 06th 2021 8:19 pm
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I believe it is the evap can purge solenoid... Both of those hoses go to the TBI? Looks like it has a larger nipple our the back. Does that go to anything?

Re: mystery vacuum hose
Brother kitten #784827 November 07th 2021 9:53 am
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carpal tunnel
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carpal tunnel
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