So i've been looking into putting a fuel cut switch into my car for better security. I've done some searching on here but my search came up dry.

Can anyone tell me what im going to need and about how much this would cost me?

Does anyone have this done to their FC?

All input is appreciated! Thanks guys.

 

$10 for a switch.


It's pretty straight forward, just find the 12v switched to the fuel pump, cut it, and put the wire in between.
Make sure to use clips and solder the ends to prevent corrosion.

I have mine mounted on the inside of my middle console. Since I have the S5 console, it fits nicely on the inside where the console angles down. Maybe I can take a pic later.

 

thanks!


I would love to see a picture.
I've been debating on where to put mine.

 

I've also seen them mounted above the hood release. On S4s there is a small indention right there... don't know what it was intended for...? But I've seen fuel cut switches mounted there.

I like mine mounted in the console because the wires for the fuel pump are going that way anyway, so I didn't have to string a bunch of wire to another area of the car. Plus you can't see the switch and no one can accidentally bump it.

I'll get you a pic tonight.

 

All 7's need a fuel cut switch. I think the best spot to mount them is on the heat vent surround under the steering column. Sort of unobtrusive but easily reached and the fuel relay is only about a foot away under the dash. Cut any one of the fuel relay wires and interpose an on/off switch. Besides security (sort of) they make flooding a thing of the past.

 

My car never floods, this is purely security.

Pics as promised.

 

thats a nifty spot. i have the S4 center. I'm thinking about putting it in there still or mounting it near the steering column where i took off my cruise control.

 

i like putting stuff in there.. it would just get knocked around, and that would be the first spot a thief hits looking for gold and whatever valuables..

 

not sure a petty thief would know what they were looking at if they found these two switches...

 

theres a nice write up on rotaryresurrection.com

 

"OMG NOSSSSSS !!"

lol...

 

LOL, I over night shipped it from JAPAN!!

 

Don't these switches need to be rated for at least 15 amps? In the re-wire writeups, that has been the minimum fuse needed to supply power to the pump. Anyone have problems burning out switches with that level of current?

 

Yeah, they'd flip the switch and think they blew the engine on the car they just stole.

 

I burned out one switch when installing it for my AI system. It was a 3-prong switch and I didn't ground it... oooops

Seriously, it is almost impossible to find a 2-prong, non-madJDMTyte, simple toggle switch anymore. They all have LEDs now.

 

go to radio shack

 

i did, all the automotive switches had LEDs...!!!

 

yeah the one by me has nice chrome toggles

 

how does this fuel cut switch prevent flooding??

 

The fuel cut will stop feeding fuel to the motor. When you have leaky injectors pressure in the fuel lines will force the fuel out of the injector into the motor causing it to flood. Cutting off the fuel will leave the fuel lines dry and fuel not leak into the motor.

There are other reasons for flooding but I think this is one of the modst common types



Also if you plan on wiring a fuel cut switch, If you are making the wire more than 4-5 feet in length I would suggest adding a relay. If you make the wire too long, you can take away current from the wire by extending it, and could lead to a loss in fuel pressure. Add the relay right onto the wire, and use the switch as a trigger to turn on the relay.



Basically.....



This is a very simple diagram. BTW

 

[QUOTE=al0389;9057908]The fuel cut will stop feeding fuel to the motor. When you have leaky injectors pressure in the fuel lines will force the fuel out of the injector into the motor causing it to flood. Cutting off the fuel will leave the fuel lines dry and fuel not leak into the motor.


Are you referring as when the car is shut off??? there isnt any power to the fuel pump, so there shouldnt be any fuel in the line??

 

I was speaking about any pressure left in the line after that car has been shut off. The fuel pump will shut off but there may still be pressure left in the lines. The same reason why people must relieve the fuel system before servicing the fuel system. There is still some pressureleft in the lines

 

its a pretty simple idea... you turn your car on and turn the switch off. Once your fuel pump is off, the motor will suck all the remaining fuel from the lines, then the motor will die.

Now you can turn the switch on and start the motor with no fuel in the motor. Your car is "de-flooded" and will start right up once fuel reaches the motor again.

 

Ah....got it (sound like a good idea). I think, I will install one in my car.
But is this mean that I have to shut off my car this way every time?? I don't really have an issue with starting up my car.

 

My car used to flood just about every night, I installed the kill switch so that I could kill the fuel pump, let the car die, and the next morning crank it right up. It also served as an anti-theft because I have the switch tucked under the leather of the door panel. Nobody could ever find it.

You don't need to turn off your car like that, you can always just leave the switch on, and then, if it ever floods, have the switch to your convinience. Or turn off the switch as an anti-theft device.