Vaccum solenoid switch
 

OK where do i get one of these......does the local auto parts store have them?

Re: Vaccum solenoid switch
 

Check with Jerry @ Jerry's Gaskets.com is where I'd look first!;)

Re: Vaccum solenoid switch
 

AC Delco 214-358. Amazon or Rock Auto. I am waiting on one from Amazon right now to install this weekend. You do have to cut a spline out of the connector port and swap the bracket. The originals are no longer available.

Re: Vaccum solenoid switch
 

There are 2 types of the solenoid valves,the early type takes a small square foam filter and the later design takes a cylinder type filter. Does anybody know what type of filter this 214-358 takes,looks like the early design.

Re: Vaccum solenoid switch
 

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).
https://cimg3.ibsrv.net/gimg/www.cor...9407ac2631.jpghttps://cimg5.ibsrv.net/gimg/www.cor...7ebb645f89.jpg

Solenoid located on Charcoal Canister (not shown) under Drivers Headlight (90').

Re: Vaccum solenoid switch
 

214-358 has the square thin filter. The spring steel filter cover snaps on to either the early or late LT5 bracket. Easy peasy. I am doing a 93 MY right now. Test your replacement solenoid before install. I had a bad one that the plastic was malformed inside the nipples.

Re: Vaccum solenoid switch
 

Thanks guys!!

Re: Vaccum solenoid switch
 

The filter for the switch is $13.00. This is for a piece of foam that is maybe 1/8 in thick and is 5/8 by 3/4 of an inch. When I went to the dealer to buy the cylinder shaped filter the parts guy ordered this one instead. I thought it was so absurd to charge $13.00 for such a small piece of foam I paid for it and kept it,shows how smart I am.

Re: Vaccum solenoid switch
 

Just wondering......the OEM part has 3 vacuum ports and the replacement has 3 ports.....how do you make it work?

Re: Vaccum solenoid switch
 

The second switch with the silver nipple is the later design that takes the slip on filter.

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.

Re: Vaccum solenoid switch
 

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.

Re: Vaccum solenoid switch
 

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.

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.

Re: Vaccum solenoid switch
 

Do you know the early (90) part # , I know it is discontinued.

Re: Vaccum solenoid switch
 

I have noticed the new ones not holding vacuum pressure did you test the new ones any issues?

Re: Vaccum solenoid switch
 

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.

Re: Vaccum solenoid switch
 

I installed one 3 years ago for myself and another 6 months ago for another car. Maybe I got lucky?

Re: Vaccum solenoid switch
 

I ended up buying a used one that passed vacuum test

Re: Vaccum solenoid switch
 

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.

Re: Vaccum solenoid switch
 

After ordering a new one last fall and it didn’t work and wouldn’t seal or hold vacuum I went into the shop and started digging..... I ended up using a factory boost solenoid from a 300zx twin turbo car..... held 25 inches of vacuum for almost an hours so is more than adequate..... gv126-14 ..... also used on many other factory Nissan turbo cars during the 90’s ..... only problem is that it doesn’t have a bleed or filter over it so I put a vacuum t just below the map sensor under the ecu and actually used the bleed from the new one I had just bought new ..... took it apart took out the piston tube with the bleed and forced it into a short piece of silicone vacuum tube and went for my first beast mode pass since it wasn’t working when I bought the car..... without the bleed car felt like fuel cut in a Mitsubishi turbo car..... I know not a ac delco part not as designed or an ncrs part but works better than factory and in 4th gear under full throttle does it really matter 😎...... I’m sure a Mac valve that everyone uses for boost controllers would work as well..... hope this helps

Re: Vaccum solenoid switch
 

I had a new version GM solenoid on my shelf I was going to install on my 90, after reading this thread, I did a vacuum test, it failed new out of the box. It has the cardboard looking gasket behind the filter.... Jerry, do you have a new GOOD old version of the solenoid for a 90? The stock one still holds vacuum, I could re-install it if needed. THX