inbou

I have tried using the search, but i could find anything simple enough for me to confidently do alone. Can some one point me to a detailed guide on how to make a fuel cut off switch, pictures would be nice .

13bRotaryBori

iTrader: (1)

is urs S4 or S5? if its a S4.. cut the black ground on the fuel pump connector ( it shuld have like 4 or 5 wires on the connector.. cut the black one..

inbou

its an S5

bd180

I couldn't find the wire anyone was talking about, so I routed a wire to the fuse and back it works great

inbou

Sorry i am not to familiar with this, what fuse are you talking about? egi?

Graffitipanda

good to hear someone els tryed that... thats what im going to do now.

because ive hacked up about every wire with the car on.. and no one wire killed the car....

Graffitipanda

no the fuel pump fuse... i think is the 3rd from the left under the hood

g14novak

iTrader: (1)

I do hope you realize that with the pump off, theirs still pressure in the fuel system. It'll take the car about a good minute or two with no power to the pump for it to kill the car.

I just made mine on a on/off switch. put the ground for the pump on the body by the tail lights, ran a wire up to a switch, through the firewall to a fuse-able link, then to the battery.

I personally found it easier than probing wires...

bd180

I'll post pics as soon as I can to help with this

misterstyx69

iTrader: (142)

That IS NOT the fuel pump Fuse.That is The Electronic Fuel Injection Fuse.(or EGI fuse.).

2slow4stock

iTrader: (18)

You said, it's S5. Just hold down the pedal while trying to start it. S5 fuel cut off, is holding down the gas pedal all the way.

AGreen

iTrader: (11)

So you could do that, or just make or get one of these.

http://www.mazdatrix.com/c-bleed.htm

The idea is that there is a SMALL orifice between the pressure and return lines that allows a TINY bit of fuel to leak straight to the return, but not enough to harm performance. But when you turn the car off, the fuel pump is de energized, no longer pumping pressure, and over a couple minutes, the pressure is relieved and you won't flood from shitty injectors.

Otherwise, if it's not an injector problem, but rather a compression problem, find the black/yellow wires at the injectors and trace it back in the harness until you find where they become one wire. Cut the one wire, and splice in a switch. That will turn the injectors off, while the spark plugs are still firing, killing the car quickly.

But these are only band-aids, and should only be used until the actual problem can be fixed.

See photo:

Graffitipanda

I tryed tye fuse cutoff and it killed y tach and speedo so i dont suggest that. So i started cutting wires while the car was on at the fuel pump the black and white wirwd killed it.. So i ran wire rigged a switch and no more running back to my hatch to start the car. Try that it is the ground but you wont have to worry about arching the pump has another base ground to tye chassies. (my .02 on that) and goodluck

Graffitipanda

Yeah... Im not a novice when it comes to fuel systems so sorry but in this case nothing killed the car eccept the black and white ground.

Graffitipanda

I didnt know the car had an fd fuel pump until the other day wich made it clearer as to why my pump was so loud