Need Vacuum Solenoid

[DanStokes]

Does anyone know of a normally open 12 VDC vacuum valve? The Benz shutoff works when vacuum is applied (yep, that's right) to stop the fuel. To make it work with the emergency shut-off I'll need a vacuum reservoir (got that) and a switch that opens and sends vacuum to the shut-off. Hoping to find one at the Pick-N-Pull but maybe I'll have to pop for a pricey new unit.

Also - any ideas on a vacuum switch that will shut the pump off when the reservoir is up to negative pressure? The pump I found has some stuff hanging off it (relays and such) but I'm not sure what all it does. BTW - I found the pump on a V6 S-10, maybe 1995 or so. A score (I hope) at P&P. Maybe someone know how those are rigged from GM.

Dan

[Beagle]

get it? You already have a vacuum machine.

wait - steal one of these from the some unsuspecting parent:

[TC]

[TC]

Dan fallow the link I'm sure something will work.....

http://www.ebay.com/sch/i.html?_odkw=fuel+pump+vacuum+switch&_osacat=0&_from=R40&_trksid=p2045573.m570.l1313&_nkw=vacuum+switch&_sacat=0

Or this one.... I added 12v to the search...

http://www.ebay.com/sch/i.html?_odkw=vacuum+switch&_osacat=0&_from=R40&_trksid=p2045573.m570.l1313&_nkw=vacuum+switch+12v&_sacat=0

[Beagle]

I was actually serious about the nasal aspirator.

http://www.nostalgicairparts.com/air-conditioning/vacuum-actuator-solenoid-412.php

[Barry Donovan]

subaru has one, I saved 3 of them, 20 years old, errorless.

I think they called them purge valves, but easily made a switch.

they are getting 106 bucks for them for reasons i could guess.


tiny little valve.

or you could look purge valve at ebay (they are the damn control valve)
just look for electric version.
funny enough, what you want as normally open..you can change your mind and go normally closed. that is why I kept the valves, they can do anyhtng..a bit like a relay to electricity, except its vacuum.

I see delphi for gm and the dodge viper is a few beefy examples

[TheSilverBuick]

Tons of Evap vacuum switches out there and some old cruise control unit ones that will probably work for you.

Here is something I made to control my Thunderbird's vacuum head light doors when the OE valve failed. I used this until I finally broke down and bought a rebuilt OE valve.

The top one is an evap valve on all sorts of GM cars for a dozen years (on the carbon canister). I think a nipple should be threaded into the port pointed at the screen, unless you are simply going to leave it open to the air to bleed the vacuum. The bottom one is the vacuum release valve from a cruise control set from the '70's.

[DanStokes]

Thanks Randal. THAT'S what I was looking for. Are either of those normally open?

I did send off an E-mail to Peter Paul (major makers of solenoids) to see what their stuff would cost. They're supposed to get back on Monday according to their computer-generated response.

Dan

[TheSilverBuick]

I'm pretty sure no, but I can track them down tomorrow and double check. The evap one opens with power and the cruise control one closes AND vents the vacuum when switched off.

[TC]

Hey Dan would this work, it does say it's normally open..... It's a vacuum switch to active the lockup on an automatic that has a lockup converter.... There are others with different vacuum ranges, just search "Lockup Vacuum Switch" and others will appear, here is what I found....

http://www.ebay.com/itm/Adjustable-Universal-Vacuum-switch-1-6-inHG-lockup-700r4-2004r-350c-superior-/300824732720?pt=LH_DefaultDomain_100&hash=item460a8d2430&vxp=mtr

[DanStokes]

Thanks guys. The cruise control solenoid might work but I have a call in to Peter Paul Electronics and will pop the big bux (~$50) for an instrument grade 12VDC 3 port solenoid. I KNOW that will work and should be durable. They're supposed to get back to me today so we can get it ordered.

One of the drawbacks to working in instrumentation for so many years is that I know what the good stuff is and sometimes it's hard to settle for the "good enough". The Monarch tach (on order), the pyrometer (here) and other goodies like that - I'm used to these things and am comfortable with them. I posted this thread hoping that there was a common salvage yard part that would work just as well, but my fussy got in the way.

Again, THANKS

Dan

[Deaf Bob]

Thanks guys. The cruise control solenoid might work but I have a call in to Peter Paul Electronics and will pop the big bux (~$50) for an instrument grade 12VDC 3 port solenoid. I KNOW that will work and should be durable. They're supposed to get back to me today so we can get it ordered.

One of the drawbacks to working in instrumentation for so many years is that I know what the good stuff is and sometimes it's hard to settle for the "good enough". The Monarch tach (on order), the pyrometer (here) and other goodies like that - I'm used to these things and am comfortable with them. I posted this thread hoping that there was a common salvage yard part that would work just as well, but my fussy got in the way.

Again, THANKS

Dan

Dan, the way I see it, better to be fussy and alive than..... Ya know...
After all ME needs you as much as you need her!

[DanStokes]

It's actually not easy to make a Diesel (at least a M-B Diesel) stop running when the battery power is cut. Being fully mechanical and requiring vacuum to make it die it takes some thinkin' cap time. I THINK I have it sorted. We'll see when I fire it up for the first time.

Dan

[TheSilverBuick]

Dan, perhaps we are over thinking the problem? Or I missed something. How does the injection pump get the fuel? Couldn't you simply shut off the fuel to the injection pump? I know you aren't supposed to starve the injection pump, but what if the priming pump was wired into the cut off and intertia switches so it was only starved "in an emergency"? If you cut fuel to the injection pump how long before the engine shuts down? Then maintain the vacuum switch for "normal" shutting off of the engine? Then one of those Evap switches could be wired to a momentary switch to shut the engine off.

[TC]

It's actually not easy to make a Diesel (at least a M-B Diesel) stop running when the battery power is cut. Being fully mechanical and requiring vacuum to make it die it takes some thinkin' cap time. I THINK I have it sorted. We'll see when I fire it up for the first time.

Dan

I didn't know you were working on a Benz diesel, 5 cylinder I presume....... I rebuilt quite a few of them when we had the Benz business, there's a trick to getting more power out of them it, do you know about it??