Electric fuel pump safety switch
Thread Starter
|
Laughing Gas
Joined: Jun 2016
Posts: 855
Likes: 56
From: Des Moines, Washington
Electric fuel pump safety switch
So I'm poking around looking for ideas to make an electric fuel pump install safer, meaning shutting it off in the event of a crash and I found this article and more specifically the switch recommended in it.
I'm liking it, I've never been excited about just running power straight from the key nor through a regular pressure switch. The PS-64 switch is specifically designed for use with an electric fuel pump.
This all came up 'cause I'm pretty sure the neighbors are tired of hearing the rusty old truck cranking and cranking and cranking to get fuel into the carb so it can lumber into life.
Michael
I'm liking it, I've never been excited about just running power straight from the key nor through a regular pressure switch. The PS-64 switch is specifically designed for use with an electric fuel pump.
This all came up 'cause I'm pretty sure the neighbors are tired of hearing the rusty old truck cranking and cranking and cranking to get fuel into the carb so it can lumber into life.
Michael
Tuned
Joined: May 2016
Posts: 448
Likes: 13
When I put my electric pump in. I went to the parts store and asked for there book with all the switches. I looked through it until I found a switch with the thread size of wanted and would only come on with 4/7 psi of pressure. I put it in a tee in my oil pressure sensor port. And used a relay run using my coil wire as a trigger. And ran the ground of the relay through the pressure switch. It had not failed me yet and the whole set up with. The switch and relay was inexpensive.
Moderator & parts slinger
Joined: Feb 2007
Posts: 50,150
Likes: 5,783
From: S/W Missouri, Polk county
Great "article", thanks for the link, I like that info alot, especially since I am converting the Bronco to a TBI and ditching the mechanical pump for an electric one.
Thread Starter
|
Laughing Gas
Joined: Jun 2016
Posts: 855
Likes: 56
From: Des Moines, Washington
When I put my electric pump in. I went to the parts store and asked for there book with all the switches. I looked through it until I found a switch with the thread size of wanted and would only come on with 4/7 psi of pressure. I put it in a tee in my oil pressure sensor port. And used a relay run using my coil wire as a trigger. And ran the ground of the relay through the pressure switch. It had not failed me yet and the whole set up with. The switch and relay was inexpensive.
Michael
Logistics Pro
Joined: Jul 2005
Posts: 4,217
Likes: 154
There are also Inertia Switches which Ford put in most, if not all, vehicles with an electric fuel pump. One of those will stay closed until it senses an impact, at which point it will open, stopping the pump even if your engine continues to run. Simply press the button to reset back to closed.
Cars always seem to have them mounted in the trunk/hatch area, while trucks, at least older Rangers, have them mounted inside the cab near the firewall.
Cars always seem to have them mounted in the trunk/hatch area, while trucks, at least older Rangers, have them mounted inside the cab near the firewall.
Thread Starter
|
Laughing Gas
Joined: Jun 2016
Posts: 855
Likes: 56
From: Des Moines, Washington
There are also Inertia Switches which Ford put in most, if not all, vehicles with an electric fuel pump. One of those will stay closed until it senses an impact, at which point it will open, stopping the pump even if your engine continues to run. Simply press the button to reset back to closed.
Cars always seem to have them mounted in the trunk/hatch area, while trucks, at least older Rangers, have them mounted inside the cab near the firewall.
Cars always seem to have them mounted in the trunk/hatch area, while trucks, at least older Rangers, have them mounted inside the cab near the firewall.
I'm only 6' tall yet could reach that thing far more often than the driver liked.
Michael
Moderator & parts slinger
Joined: Feb 2007
Posts: 50,150
Likes: 5,783
From: S/W Missouri, Polk county
Trending Topics
Fleet Owner
Joined: Dec 2009
Posts: 20,678
Likes: 82
From: NorCal
There are also Inertia Switches which Ford put in most, if not all, vehicles with an electric fuel pump. One of those will stay closed until it senses an impact, at which point it will open, stopping the pump even if your engine continues to run. Simply press the button to reset back to closed.
Cars always seem to have them mounted in the trunk/hatch area, while trucks, at least older Rangers, have them mounted inside the cab near the firewall.
Cars always seem to have them mounted in the trunk/hatch area, while trucks, at least older Rangers, have them mounted inside the cab near the firewall.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
2027 Super Duty Carhartt Package First Look: 12 Things You NEED to Know!
Michael S. Palmer
10 Most Surprising 2026 Ford Truck Features!
Joe Kucinski
Top 10 Ford Trucks Coming to Mecum Indy 2026
Brett Foote
5 Best / 5 Worst Ford Truck Wheels of All Time
Joe Kucinski
Elder User
Joined: Jun 2005
Posts: 542
Likes: 1
https://www.ebay.com/itm/Fuel-Pump-E...YAAOSwcB5ZMh4F
I've never used one of these, but heard good things - it lets the pump run for 3 seconds with key-on to prime up the bowl, then uses tach signal instead of oil pressure to signal on/off. The 3-second on part was what I liked, you don't have to spin the motor to fill the carb back up. But it does cost more -
I've never used one of these, but heard good things - it lets the pump run for 3 seconds with key-on to prime up the bowl, then uses tach signal instead of oil pressure to signal on/off. The 3-second on part was what I liked, you don't have to spin the motor to fill the carb back up. But it does cost more -
Senior User
Joined: Oct 2012
Posts: 168
Likes: 0
Thread Starter
|
Laughing Gas
Joined: Jun 2016
Posts: 855
Likes: 56
From: Des Moines, Washington
That's the "passenger engine shutdown pedal" I mentioned above. Every time I stretched, I hit the darn thing and shut his truck down. He didn't like it much.
Michael
Fleet Mechanic
Joined: Mar 2005
Posts: 1,343
Likes: 12
From: Wichita Falls TX
https://www.ebay.com/itm/Fuel-Pump-E...YAAOSwcB5ZMh4F
Just purchased one of these! Thanks for the link. I'm (slowly) doing the FiTech EFI with the Tanks Inc in-tank pump / 38 gallon tank.
David
Just purchased one of these! Thanks for the link. I'm (slowly) doing the FiTech EFI with the Tanks Inc in-tank pump / 38 gallon tank.
David
Thread
Thread Starter
Forum
Replies
Last Post
AK FORD GUY
1973 - 1979 F-100 & Larger F-Series Trucks
17
Mar 19, 2015 08:29 PM
76CamperSpecial
1973 - 1979 F-100 & Larger F-Series Trucks
3
May 31, 2008 11:35 PM
76CamperSpecial
1973 - 1979 F-100 & Larger F-Series Trucks
3
May 27, 2008 10:04 AM
maharashii
Fuel Injection, Carburetion & Fuel System
8
Aug 18, 2003 02:06 PM