- -
UserInfo

Welcome Anonymous




Membership:
Latest: 996rshmp
New Today: 0
New Yesterday: 0
Overall: 878

People Online:
Members: 1
Visitors: 4
Bots: 24
Total: 29
Who Is Where:
Members:
Visitors:
01. Forums
02. Forums
03. Forums
04. News
 Bots:
01. Forums
02. Forums
03. Forums
04. Forums
05. Forums
06. Forums
07. Forums
08. Forums
09. Forums
10. Forums
11. Forums
12. Forums
13. Forums
14. Forums
15. Forums
16. Forums
17. Home
18. Forums
19. Content
20. Login
21. Forums
22. Forums
23. Forums
24. Login
Hidden: 1
Staff Online:

No staff members are online!
We have received
31129040
page views since
July 27, 2010

Hits New Today: 6827
Hits New Yesterday: 28755

Server Time
22 September 2017 05:49:06 AEST (GMT +10)
Content > DIY Projects > DIY electric fuel pump safety cutoff for $50 > Mustang Forum Australia - Mustang Tech

DIY electric fuel pump safety cutoff for $50

Make that electric fuel pump install a little safer.

When electric fuel pumps are installed to carby fed vehicles, they are often just connected to the ignition circuit to run whenever the ignition is on. This can be dangerous in an accident if the fuel lines are severed and the driver is not able to turn off the ignition for whatever reason. There are a number of ways to increase the safety of this setup, including inertia switches that cut the power to the fuel pump when a big enough inertia is caused by an accident. In this setup, we will sense the ignition signal and cut the fuel pump when the engine stalls. This device is based on a readily accessible Jaycar kit.

Items Required

  • Jaycar kit KC5378 - Only available online
  • Jaycar HB6014 or UB3 case
  • 10mm tapped spacers and screws to mount the board to the case.
  • Some extra wire

The kit and case were around $50 delivered.



Assembly

Assemble the kit as per the instructions.
Attach wires to 12v, Gnd, signal in, and two wires for one of the normally open circuits.


Mount the board to the lid of the box and measure up to determine where to drill a hole for the wires to exit.
Wire up the 12v wire to an ignition source and Gnd to a good ground source.
Break the existing fuel pump relay activation wire, and connect it across the two normally open circuit wires (the green ones in my picture).
Connect the input signal wire to your tacho input wire (coming either from your coil negative, or electronic distributor tacho signal).
You will need to adjust the pots on the board so that the fuel pump activates during cranking.

The finished product will look something like this:



This is a relatively simple and cheap method of putting a fuel pump safety device in your vehicle.
When the engine stalls and there is no more ignition signal, the fuel pump will be disabled.

As always, Mustangtech and it's members take no responsibility for you setting yourself on fire or harming yourself in any other way by using information provided on this website. No warranties are given, nor should be implied.
SocialMedia

Like this page? Google +1 it!

ComingEvents
LatestForumPosts
Last 10 Forum Messages

hybrids 1966 Coupe Project
Last post by nassi in Mustang Projects on Sep 21, 2017 20:58:50

69 Mach 1 351W 5 speed
Last post by ozbilt in Mustangs for Sale on Sep 19, 2017 21:16:54

Ronin187 - pics as promised
Last post by Husky65 in Mustang Projects on Sep 18, 2017 21:17:52

Jacko's Project
Last post by Ausjacko in Other Projects on Sep 18, 2017 15:48:34

diff gears
Last post by ozbilt in Pre 1973 on Sep 17, 2017 21:15:58

Megasquirt - a story of injection
Last post by hybrid in General Tech Advice on Sep 16, 2017 17:21:27

Sidchrome Project Car - Mustang Edition
Last post by StephenSLR in Pre 1973 on Sep 15, 2017 09:59:57

Hello, I don't have one.
Last post by cage in 2015 onward on Sep 15, 2017 08:51:26

Brake,indicator lights
Last post by 66STNG in General Tech Advice on Sep 15, 2017 08:04:39

tech article -exhaust drone
Last post by Keegan in General Tech Advice on Sep 13, 2017 20:47:25

TopPostersToday
   Husky65 
 Posts: 
 6 

   nassi 
 Posts: 
 3 

   hybrid 
 Posts: 
 3 

   Pinto-Pete 
 Posts: 
 2 

   boofhead 
 Posts: 
 2 

   malscar 
 Posts: 
 2