Home » Public Forums » GMCnet » Inertial Fuel Cutoff Switch
| Inertial Fuel Cutoff Switch [message #342257] |
Thu, 04 April 2019 15:21  |
 |
Tom Lins
Messages: 372
Registered: February 2004
Location: St Augustine, FL
Karma: 1
|
Senior Member |
|
|
Being the worrywart that I am the accident and subsequent fire has me concerned about what happens when you have a serious accident and a fuel line gets ruptured and your high pressure fuel pump is still running?
I worry that I (or whoever is driving) would not have the presence of mind to turn off the ignition or possibly unable to turn it off.
Has anyone installed a inertial switch wired to kill the fuel pump should you have an accident.
If you did what did you use?
Tom Lins
St Augustine, FL
77 GM Rear Twin, Dry Bath, 455, Aluminum Radiator Quad-Bag Suspension Solar Panel
Manuals on DVD
YOUTUBE Channel: GMC Dealer Training Tapes
http://www.bdub.net/tomlins/
|
|
|
|
| Re: [GMCnet] Inertial Fuel Cutoff Switch [message #342258 is a reply to message #342257] |
Thu, 04 April 2019 15:36  |
James Hupy
Messages: 6806
Registered: May 2010
Karma: -62
|
Senior Member |
|
|
Legitimate concern. Some use oil pressure switches, but if the engine is
still running, they have no value. I reason that fire suppressants have
great value on board with fires, but inertial switches like the
ones that trigger air bags may have an application here. 2 lane, multi
directional roads play a part, as do inattentive drivers.
Jim Hupy
On Thu, Apr 4, 2019, 1:22 PM Tom Lins via Gmclist
wrote:
> Being the worrywart that I am the accident and subsequent fire has me
> concerned about what happens when you have a serious accident and a fuel
> line
> gets ruptured and your high pressure fuel pump is still running?
> I worry that I (or whoever is driving) would not have the presence of mind
> to turn off the ignition or possibly unable to turn it off.
> Has anyone installed a inertial switch wired to kill the fuel pump should
> you have an accident.
> If you did what did you use?
>
>
> --
> Tom Lins
> St Augustine, FL
> 77 GM Rear Twin, Dry Bath, 455, FI-Tech EFI
> Manuals on DVD
> http://www.bdub.net/tomlins/
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
|
|
|
|
|
|
| Re: [GMCnet] Inertial Fuel Cutoff Switch [message #342260 is a reply to message #342258] |
Thu, 04 April 2019 15:42 |
Randy Hecht
Messages: 93
Registered: March 2019
Location: Roswell, GA
Karma: -5
|
Member |
|
|
I believe the Ford Crown Victoria has a inertia switch to shut down the fuel pump from impacts.
Chaplain Randy Hecht
Chaplains are ready to Listen when you're ready to talk.
> On Apr 4, 2019, at 4:36 PM, James Hupy via Gmclist wrote:
>
> Legitimate concern. Some use oil pressure switches, but if the engine is
> still running, they have no value. I reason that fire suppressants have
> great value on board with fires, but inertial switches like the
> ones that trigger air bags may have an application here. 2 lane, multi
> directional roads play a part, as do inattentive drivers.
> Jim Hupy
>
> On Thu, Apr 4, 2019, 1:22 PM Tom Lins via Gmclist
> wrote:
>
>> Being the worrywart that I am the accident and subsequent fire has me
>> concerned about what happens when you have a serious accident and a fuel
>> line
>> gets ruptured and your high pressure fuel pump is still running?
>> I worry that I (or whoever is driving) would not have the presence of mind
>> to turn off the ignition or possibly unable to turn it off.
>> Has anyone installed a inertial switch wired to kill the fuel pump should
>> you have an accident.
>> If you did what did you use?
>>
>>
>> --
>> Tom Lins
>> St Augustine, FL
>> 77 GM Rear Twin, Dry Bath, 455, FI-Tech EFI
>> Manuals on DVD
>> http://www.bdub.net/tomlins/
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
|
|
|
|
|
|
| Re: Inertial Fuel Cutoff Switch [message #342263 is a reply to message #342257] |
Thu, 04 April 2019 16:22 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
|
Senior Member |
|
|
I suspect the4 Crown Vic uses the same setup as did my '05 Ranger pickup. On the passenger side firewall just above the toeboard inside th4e cab behin a tin guard there is a shock/turnover switch. which I found by tossing a gun case over on the passenger sid, striking it, and immobolizing the truck till I found it and pressed the top of it. CLICK. Everything then worked and I drove it another 120k miles. Available in any junkyard.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
|
|
|
|
|
|
| Re: Inertial Fuel Cutoff Switch [message #342266 is a reply to message #342263] |
Thu, 04 April 2019 16:48 |
GatsbysCruise
Messages: 261
Registered: January 2017
Location: Waukegan, Illinois
Karma: 3
|
Senior Member |
|
|
I had thought of the OIl pressure monitor, that is simply a relay added in the circuit to a Electric fuel pump.
and yes, if the engine keeps running, so will the fuel pump.
An Inertia sensor, like the airbags have, would work but maybe you need to go further than just the fuel pump.
If a vehicle hits an object, say a big ole TREE at about 30 MPH. There can/will be significant damage.
THE GMC has that gas line running in front and below the radiator. if that line ruptures, gravity alone
will let the fuel flow.
I was thinking that you may need a solenoid installed at the fuel tanks, on the fuel lines for a positive
shut off of fuel. Even if that gas line is broken, with the solenoid slammed shut, the fuel flow will stop.
I may be thinking too much, I have that habit. Even so, we don't see that many accidents with fires, do we?
Just thinking out loud again.
slc
GatsbysCruise. \
74GMC260 Former Glacier Model style. \
Waukegan, Illinois \ Keep those MiniDiscs Spinning \ MY GREYHOUND IS FASTER THAN YOUR HONOR ROLL STUDENT \ WindowsXP-Win7-Win8.1-UBUNTU STUDIO - UBUNTU VOYAGER - Berzin Auto Center
[Updated on: Thu, 04 April 2019 16:50] Report message to a moderator |
|
|
|
|
|
|
|
| Re: [GMCnet] Inertial Fuel Cutoff Switch [message #342273 is a reply to message #342260] |
Thu, 04 April 2019 17:28 |
Len Novak
Messages: 676
Registered: February 2004
Location: Las Vegas, NV
Karma: -3
|
Senior Member |
|
|
My Ford Ranger had an impact (inertia) switch in the firewall. I just might
do that this weekend
Len and Pat Novak
1978 GMC Kingsley
The Beast II with dash lights that work and labels you can see!
Fallbrook, CA new email: B52Rule@Roadrunner.Com
http://www.gmcmhphotos.com/photos/showgallery.php?cat=4375
www.bdub.net/novak/
-----Original Message-----
From: Gmclist [mailto:gmclist-bounces@list.gmcnet.org] On Behalf Of Randy
Hecht via Gmclist
Sent: Thursday, April 04, 2019 1:42 PM
To: gmclist@list.gmcnet.org
Cc: Randy Hecht
Subject: Re: [GMCnet] Inertial Fuel Cutoff Switch
I believe the Ford Crown Victoria has a inertia switch to shut down the fuel
pump from impacts.
Chaplain Randy Hecht
Chaplains are ready to Listen when you're ready to talk.
> On Apr 4, 2019, at 4:36 PM, James Hupy via Gmclist
wrote:
>
> Legitimate concern. Some use oil pressure switches, but if the engine is
> still running, they have no value. I reason that fire suppressants have
> great value on board with fires, but inertial switches like the
> ones that trigger air bags may have an application here. 2 lane, multi
> directional roads play a part, as do inattentive drivers.
> Jim Hupy
>
> On Thu, Apr 4, 2019, 1:22 PM Tom Lins via Gmclist
> wrote:
>
>> Being the worrywart that I am the accident and subsequent fire has me
>> concerned about what happens when you have a serious accident and a fuel
>> line
>> gets ruptured and your high pressure fuel pump is still running?
>> I worry that I (or whoever is driving) would not have the presence of
mind
>> to turn off the ignition or possibly unable to turn it off.
>> Has anyone installed a inertial switch wired to kill the fuel pump should
>> you have an accident.
>> If you did what did you use?
>>
>>
>> --
>> Tom Lins
>> St Augustine, FL
>> 77 GM Rear Twin, Dry Bath, 455, FI-Tech EFI
>> Manuals on DVD
>> http://www.bdub.net/tomlins/
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
---
This email has been checked for viruses by AVG.
https://www.avg.com
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Len and Pat Novak
1978 GMC Kingsley
The Beast II with dash lights that work and labels you can see!
Las Vegas, NV new email: B52sRule@Gmail.com
http://www.gmcmhphotos.com/photos/showgallery.php?cat=4375
www.bdub.net/novak/
|
|
|
|
|
|
| Re: Inertial Fuel Cutoff Switch [message #342281 is a reply to message #342257] |
Thu, 04 April 2019 19:12 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
|
Senior Member |
|
|
It is all a guessing game trying to predict the scenario of what might happen. In my case my the engine fire started while the vehicle was parked and running. So an inertia switch would not have helped. I did have an oil pressure switch and Laurie turned off the engine and ran out of the coach whhen the fire started. The pump kept running and feeding gasoline on the fire because. The fire had already melted the pump wire and shorted it to ground keeping it running.
I still use an oil pressure switch and an inertia one might be an added piece of protection in some scenarios. My only experience with them has been in Ford sedans with them mounted in the trunk. They occasionally get tripped accidentally so mount it somewhere where you can get to it easily to reset it.
Go for it. The junk yards are full of old Fords.
An automatic deploy AR-AFFF extinguisher might be another option as it would protect against not only gas but oil and trans fluid fires too.
I do not like halon types because it takes a lot of Halon to extinguish vehicle fires especially when the vehicle is moving, but take a look at this one: I have one mounted in my Onan area. If you want more Halon capacity simply buy a longer one.
https://www.blazecutusa.com/collections/blazecut-for-vehicles
https://www.youtube.com/watch?v=Kswau1mGBE8
https://www.youtube.com/watch?v=iePku-2jh
https://youtu.be/JPHkLWQ3150
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
|
|
|
|
| Re: [GMCnet] Inertial Fuel Cutoff Switch [message #342287 is a reply to message #342273] |
Thu, 04 April 2019 17:50 |
k2gkk
Messages: 4452
Registered: November 2009
Karma: -8
|
Senior Member |
|
|
Any fuel cutoff should be mounted as far to the rear as possible in a fuel line that delivers ALL fuel.
D C "Mac" Macdonald
Amateur Radio K2GKK
Since 30 November '53
USAF and FAA, Retired
Member GMCMI & Classics
Oklahoma City, OK
"The Money Pit"
TZE166V101966
'76 ex-Palm Beach
________________________________
From: Gmclist on behalf of Len Novak via Gmclist
Sent: Thursday, April 4, 2019 17:28
To: gmclist@list.gmcnet.org
Cc: Len Novak
Subject: Re: [GMCnet] Inertial Fuel Cutoff Switch
My Ford Ranger had an impact (inertia) switch in the firewall. I just might
do that this weekend
Len and Pat Novak
1978 GMC Kingsley
The Beast II with dash lights that work and labels you can see!
Fallbrook, CA new email: B52Rule@Roadrunner.Com
https://nam03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.gmcmhphotos.com%2Fphotos%2Fshowgallery.php%3Fcat%3D4375& ;data=02%7C01%7C%7Cd984277307b94e137faa08d6b94cf8f3%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636900137569162953&sdata=G0NvK1mVACmmYOkkML%2 FQB%2FjNdYdQISgX%2BBStoYV5T4M%3D&reserved=0
https://nam03.safelinks.protection.outlook.com/?url=www.bdub.net%2Fnovak%2F& ;data=02%7C01%7C%7Cd984277307b94e137faa08d6b94cf8f3%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636900137569162953&sdata=ZAjeThFsKSP8H2hYttYA y3voYfg9wc8rXC90ksF5Cp0%3D&reserved=0
-----Original Message-----
From: Gmclist [mailto:gmclist-bounces@list.gmcnet.org] On Behalf Of Randy
Hecht via Gmclist
Sent: Thursday, April 04, 2019 1:42 PM
To: gmclist@list.gmcnet.org
Cc: Randy Hecht
Subject: Re: [GMCnet] Inertial Fuel Cutoff Switch
I believe the Ford Crown Victoria has a inertia switch to shut down the fuel
pump from impacts.
Chaplain Randy Hecht
Chaplains are ready to Listen when you're ready to talk.
> On Apr 4, 2019, at 4:36 PM, James Hupy via Gmclist
wrote:
>
> Legitimate concern. Some use oil pressure switches, but if the engine is
> still running, they have no value. I reason that fire suppressants have
> great value on board with fires, but inertial switches like the
> ones that trigger air bags may have an application here. 2 lane, multi
> directional roads play a part, as do inattentive drivers.
> Jim Hupy
>
> On Thu, Apr 4, 2019, 1:22 PM Tom Lins via Gmclist
> wrote:
>
>> Being the worrywart that I am the accident and subsequent fire has me
>> concerned about what happens when you have a serious accident and a fuel
>> line
>> gets ruptured and your high pressure fuel pump is still running?
>> I worry that I (or whoever is driving) would not have the presence of
mind
>> to turn off the ignition or possibly unable to turn it off.
>> Has anyone installed a inertial switch wired to kill the fuel pump should
>> you have an accident.
>> If you did what did you use?
>>
>>
>> --
>> Tom Lins
>> St Augustine, FL
>> 77 GM Rear Twin, Dry Bath, 455, FI-Tech EFI
>> Manuals on DVD
>> https://nam03.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.bdub.net%2Ftomlins%2F& ;data=02%7C01%7C%7Cd984277307b94e137faa08d6b94cf8f3%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636900137569162953&sdata=0TGDRcS1EO3J2M2FSwx% 2Ferb5jBTbh7DG7T7bJIhjfi8%3D&reserved=0
>>
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> https://nam03.safelinks.protection.outlook.com/?url=http%3A%2F%2Flist.gmcnet.org%2Fmailman%2Flistinfo%2Fgmclist_list.gmcnet.org& ;data=02%7C01%7C%7Cd984277307b94e137faa08d6b94cf8f3%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636900137569162953&sdata=v%2Bo2M7NIV%2F6xrjEw jNvcmS5KclqyF1Omkudm1Cz7Bd8%3D&reserved=0
>>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> https://nam03.safelinks.protection.outlook.com/?url=http%3A%2F%2Flist.gmcnet.org%2Fmailman%2Flistinfo%2Fgmclist_list.gmcnet.org& ;data=02%7C01%7C%7Cd984277307b94e137faa08d6b94cf8f3%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636900137569162953&sdata=v%2Bo2M7NIV%2F6xrjEw jNvcmS5KclqyF1Omkudm1Cz7Bd8%3D&reserved=0
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
https://nam03.safelinks.protection.outlook.com/?url=http%3A%2F%2Flist.gmcnet.org%2Fmailman%2Flistinfo%2Fgmclist_list.gmcnet.org& ;data=02%7C01%7C%7Cd984277307b94e137faa08d6b94cf8f3%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636900137569162953&sdata=v%2Bo2M7NIV%2F6xrjEw jNvcmS5KclqyF1Omkudm1Cz7Bd8%3D&reserved=0
---
This email has been checked for viruses by AVG.
https://nam03.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.avg.com& ;data=02%7C01%7C%7Cd984277307b94e137faa08d6b94cf8f3%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636900137569162953&sdata=BjNsEg3MBiIYSmRfHppt 29dGChmkD7WJypXQREs63KQ%3D&reserved=0
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
https://nam03.safelinks.protection.outlook.com/?url=http%3A%2F%2Flist.gmcnet.org%2Fmailman%2Flistinfo%2Fgmclist_list.gmcnet.org& ;data=02%7C01%7C%7Cd984277307b94e137faa08d6b94cf8f3%7C84df9e7fe9f640afb435aaaaaaaaaaaa%7C1%7C0%7C636900137569172965&sdata=HQ5YWVicHDErwsgurlh1 G%2Fysy2rc0zZKpULHDTtY14A%3D&reserved=0
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
|
|
|
|
|
|
| Re: Inertial Fuel Cutoff Switch [message #342323 is a reply to message #342307] |
Fri, 05 April 2019 23:55 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
|
Senior Member |
|
|
Tom Lins wrote on Fri, 05 April 2019 10:27Ken Burton wrote on Thu, 04 April 2019 20:12
https://www.blazecutusa.com/collections/blazecut-for-vehicles
https://www.youtube.com/watch?v=Kswau1mGBE8
https://www.youtube.com/watch?v=iePku-2jh
https://youtu.be/JPHkLWQ3150
Those are interesting for the Onan compartment given the limited space.
I think I am going to mount the inertia switch under the driver side twin bed just to the rear of the wheel well.
and splice into the power connection just before the frame mounted FITech fuel pump.
I intend to install an oil pressure cutoff also. I just want to try to eliminate as many of the issues as possible.
As I said before I dislike Halon because of it's propensity for sinking and getting blown away in the wind or any moving air. Years ago I sold and installation planned Halon systems for computer rooms, electrical distribution rooms, and telephone equipment rooms. I looked at the Onan air flow and the locations where gasoline was available for fuel. I discovered that the areas that needed protecting the most was the side toward the front of the coach and down from there to the rear bottom of the the tray where the fuel line ran. There really was no place to easily mount an automatic deploy AFFF extinguisher in those areas. Most GMC - Onan installations that I have seen, have the extinguishers mounted to the front cover to the rear away from the possible fire areas of carb, fuel pump, and fuel lines. This thing that you are looking at was thin enough and long enough to protect those primary fire areas areas and still not be in the engine driven cooling fan air flow. So I did a compromise and settled for a tube full of liquid halon.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
|
|
|
|
|
|
| Re: Inertial Fuel Cutoff Switch [message #342368 is a reply to message #342257] |
Mon, 08 April 2019 12:12 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
|
Senior Member |
|
|
Of the three vehicles I've owned with them fitted - all Fords - none ever went off except when it was hit. That being said, a GMC without a backup system for the brakes is a way to bend your coach.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
|
|
|
|
| Re: Inertial Fuel Cutoff Switch [message #342379 is a reply to message #342366] |
Mon, 08 April 2019 16:03 |
|
Tom Lins
Messages: 372
Registered: February 2004
Location: St Augustine, FL
Karma: 1
|
Senior Member |
|
|
HappyCamper wrote on Mon, 08 April 2019 09:28Inertia switches are prone to triggering in situations other than crashes. If you are going to fit an inertia switch you would be well advised to fit a vacuum accumulator and/or vacuum pump as well.
I already have a vacuum pump courtesy of the PO
I have never had a crash sensor trigger.
Probably should not have said that part given Murphy's law.
Tom Lins
St Augustine, FL
77 GM Rear Twin, Dry Bath, 455, Aluminum Radiator Quad-Bag Suspension Solar Panel
Manuals on DVD
YOUTUBE Channel: GMC Dealer Training Tapes
http://www.bdub.net/tomlins/
|
|
|
|
Goto Forum:
Current Time: Fri Sep 06 11:53:36 CDT 2024
Total time taken to generate the page: 0.01170 seconds
|
GMCforum
Search
Help
Register
Login
Home
