Fuel kill switch?
 

Hey guys I don't have a huge problem with flooding but when it happens it's not fun at all so... How do I install a fuel kill switch is it just a matter of wiring a switch into the wire going to the fuel tank or what. Help me out thanks

shouldn't be that hard...I got one hidden away so I can turn it off when parked...damn theives...

omg dub you stole my idea =P lol j/k i thought of the same thing cause thieves are pretty stupid to suspect something like that haha i think that works better than a car alarm hehe
TwEaK

First you should look into doing this: Fuel Pump Rewire (at 1300cc.com). Either way, check out the attached diagram I drew up. It shows basically the fuel pump with a switch inserted in the POS (+) line. I really don't see why this wouldn't work (unless there are some sensors or something you have to bypass - ??), but let someone else double check it. I would like to know if this would work. Good luck!

Don't put the switch in at the fuel pump. That'll require very long wires.

Look under the dash by the steering column. You'll see a relay with a yellow plug that has five wires. That's the fuel pump circuit opening relay.

Cut the middle wire (black/white) and solder two short lengths of wire to the cut ends. Connect those two wires to your switch. Put the switch in the little plastic panel under the steering column with the lap vent in it.

you also don't want the switch at the fuel pump as you'll have 10 amps going through the switch.... do it before the relays.

when you do this... dont try to get all nifty and use those three prong switches the ones that light up...


i had a hard time with mine.. basically the thing would ground when i flipped the switch and cause a blown fuse...and it was doing it everytime so someone suggested the fuse was a POS.. so i changed it to a non lighting one.. and presto done

Yea the diagram was just a guess at how to do it. Im gonna do what NZ said, and u should to xmoto, that makes more sense. And those lighted radio shack switches do suck, man it took me forever to figure out why I kept blowing fuses (I was doing some ricer neon light install in my buddys car)! I told him "ok fuck using the lighted gaudy switch they suck" cause I finally got the brains to test the lights without the switch, and presto it worked!

Nah, NZConvertible has the right idea. Thats how I did mine. Under the steering column is what is called an inertia switch, so when you get in a wreck it turns off your fuel. Like he said, tap into the middle wire. Mine works perfectly.

Inertia switch in a RX?? I musta lost that page out of my manual.

So? What's bad about 10a going thru a switch? Better a switch than a relay.

Make sure the switch is rated at 15a or better. Yeah I know the fuse is 7.5a but what the heck.

And why not use the Blue (blue/red on turbo) wire instead of the black/white?

And yes, at one time I ran a wire from the fuel pump connector up front to a switch. Not the right way for long term service. I changed and went to the relay like everyone else.

Don't want to sound stupid, but, can you corroborate on the statement "so when you get in a wreck it turns off your fuel" part.

I like the idea, but I wanted place a switch elsewhere.

OK im not sure about the intertia switch thing (never heard of it) but it sounds like if it detects that your car suddenly stopped or your airbags go off (or someother way of detecting a crash), then everything hooked up to that switch shuts off (maybe spark, etc)? Shit i dunno ;)!

***Don't want to sound stupid, but, can you corroborate on the statement "so when you get in a wreck it turns off your fuel" part.

I like the idea, but I wanted place a switch elsewhere.***


There is a switch in the afm. This switch makes a circuit when the flap in the afm is open. When the flap is closed...the fuel pump is disabled. The circuit that the afm MAKES, is the ground circuit to the Circuit Opening Relay that is being discussed in this thread. NO ground on the relay equals the relay not being engaged.

Thanks:dunce:

https://www.rx7club.com/forum/attach...postid=1398836 Turbo shown, non turbo similar.https://www.rx7club.com/forum/attach...postid=1398836

Now i get it. Thanks HAILERS! OK now I gotta figure out what I was thinking when I wrote my reply...:weed:

EDIT just thought of something. Is this switch only on S5s (where you hold the gas in all the way and start the car, then the fuel pump wont run so it will sputter and die)? Or is the holding-down-gas-while-starting method related to something else? Or is it that damn :weed: again...:D

Hailers, So, switch s/b between fuel pump resistor and inhibitor switch, right?

On series five if you hold your foot all the way down on the gas pedal.....the fuel pump should not pump. That's with the engine not running, so don't do that with the engine running and think the pump will stop.

Series four don't have that feature. Hold the pedal down on a series four and the pump will pump if the key is held to start.

By the way....the schematic I put in above is for a TURBO CAR. NOT a non turbo. Non turbo is similar. By the way, I'm refering to the Circuit Opening Relay in this thread. Nothing else.

BLACK ROCKET.....it should be done as NZCONVERTIBLE described above. Go to the relay just above the steering column. The relay has a yellow colored base. Can't miss it. You might have to remove part of a heater/airconditioning duct to get better access. It should be right above your shins.

i am very interested in doing this fuel cut off but mainly for theifs. so where else is the wire easily excesibly to do cut into it? i am assuming a theif could easiy find it in the steering column

No, do it at the steering column. The relay is just above your shins. Yellow base. I'll attach a jpg of the plug. Like the NXCONVERTIBLE said, its the black/white wire in the middle of the plug. The turbo has two black/white. DO NOT use the other black/white wire. I'll do nothing for you.

Well, I guess you could put a kill switch back at the pump if you want to. Maybe hide it there where the jack goes. Just make sure its rated at 15amps or above. That's not a convienient place to put one.https://www.rx7club.com/forum/attach...postid=2583803 Turbo plug on the right, na on the left.

Good stuff !!!! Keep posting away =).

Just FYI....the OTHER BLACK/WHITE wire in the turbo plug OR the Brown/Red wire in the na plug is pulled out and left dangling in the breeze, will have absolutly no effect on squat. I pulled my Brown/Red on my na and left it dangling in the breeze and the car starts just fine without it.

Is it possible to get some pics of it mounted under the steering column ? Thanks.

Don't need a picture. Just look at the yellow color plug...only 1 there near the steering column. Cut the black wire put a 2 pring switch and you're done.