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Old 12-07-2019   #11
whale
 
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Default Re: Vaccum solenoid switch

So there is a filter that goes on the 3rd port. That means there are only 2 vacuum ports or hoses that are used.
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Old 12-07-2019   #12
Z51JEFF
 
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Default Re: Vaccum solenoid switch

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Originally Posted by whale View Post
So there is a filter that goes on the 3rd port. That means there are only 2 vacuum ports or hoses that are used.
I believe the filter goes on the silver nipple. In the picture the switch on the top is the early design,if you look on the switch you can see the small retainer for the flat filter. Can’t answer the questions a punt the port but my guess is one line in,one line out.
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Old 03-29-2020   #13
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Default Re: Vaccum solenoid switch

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Originally Posted by Dynomite View Post
Maybe four Solenoid Valves?

Vacuum Solenoid for early (90' under Plenum).
Vacuum Solenoid (filter) for Later (95' under Plenum)................Solenoid for Charcoal Canister (91'-95' under Plenum).


Solenoid located on Charcoal Canister (not shown) under Drivers Headlight (90').
Is the later 91+ adaptable to work on a 90 or is the 90 solenoid still available? Was going to replace it for maintenance purposes.
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Old 03-30-2020   #14
Young1
 
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Default Re: Vaccum solenoid switch

Either will work. Later ones has a round filter earlier ones a flat filter. Put a new one in while you have the plenum off.
ACDelco 214-358 GM Original Equipment EGR Vacuum Regulator Solenoid Valve
$18.36 Prime FREE Delivery
Order it from Amazon.
Originals no longer available. Same valve. Different mount. You can swap out the mounts or cut each off and bolt together. I have done it both ways.
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Old 03-31-2020   #15
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Default Re: Vaccum solenoid switch

Do you know the early (90) part # , I know it is discontinued.
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Old 03-31-2020   #16
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Default Re: Vaccum solenoid switch

Quote:
Originally Posted by Young1 View Post
Either will work. Later ones has a round filter earlier ones a flat filter. Put a new one in while you have the plenum off.
ACDelco 214-358 GM Original Equipment EGR Vacuum Regulator Solenoid Valve
$18.36 Prime FREE Delivery
Order it from Amazon.
Originals no longer available. Same valve. Different mount. You can swap out the mounts or cut each off and bolt together. I have done it both ways.
I have noticed the new ones not holding vacuum pressure did you test the new ones any issues?
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Old 03-31-2020   #17
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Default Re: Vaccum solenoid switch

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Originally Posted by G8nightman View Post
I have noticed the new ones not holding vacuum pressure did you test the new ones any issues?
Agree. I ordered about 20 of them a couple of years ago and not a single one passed vacuum test. I disassembled one. If I recall correctly, the plunger seal looked like a piece of cardboard. I was planning to try to cut a piece of soft rubber to replace it.
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Old 03-31-2020   #18
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Default Re: Vaccum solenoid switch

I installed one 3 years ago for myself and another 6 months ago for another car. Maybe I got lucky?
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Old 03-31-2020   #19
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Default Re: Vaccum solenoid switch

I ended up buying a used one that passed vacuum test
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Old 03-31-2020   #20
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Default Re: Vaccum solenoid switch

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Originally Posted by Young1 View Post
I installed one 3 years ago for myself and another 6 months ago for another car. Maybe I got lucky?
The SPT system doesn't require 100%, leak free vacuum. It can withstand slow leakdown better if both check valves and the vacuum pump are working properly.

Did you vacuum test the valve prior to installation? The ones I tested weren't a total bust but they weren't serviceable in my opinion.
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