The correct way to make a Fuel pump Cut-off switch!! Tech Article

[heartagram]

Just curious, I am going to do this but have heard that speaker wire is not good to use with the ecm. I am not sure why; is that true. Also, after compeleted is there any way that this could damage my ecm in the future?

[S3t0_S13]

no, it wont damage ur ecm, and i used 14G wiring, its usefull because its bendable, and it closest size to what your car already has in it

why are you hitting the switch with your car on?

i was bored

and my friend turned my car on with the switch on, and he almost got it moving

[driftin8ez]

ey guys i dnno what the problem is, when i hit the switch, my idle drops to like 300-400, and the car seems to be choking, if u tap the gas it will shut off, but if you ease on it, you can almost get the car going

wtf, i checked my wires, and their not connecting anywhere

how did he mount it there?

When you hit the switch the car will not immediately die. There is still fuel in the rail and the lines that will get sucked out. It sounds like your switch is working correctly but it seems like you thought by installing this switch that if you flipped it when the car was still running your car would shut off like when you pull out the key. This is not the case. You are making a fuel pump kill not an engine kill. When the fuel pump gets killed you still have gas that needs to be used before the car will totally die out. Hope that helps.

and the trophy for the most random and irrelavant post in regards to thread topic goes to...Keimcongradulations!

Couldn't have said it better myself.

[S3t0_S13]

sorry, i made it sound wrong

i had the fuel pump switch on

and my friend got the car started and got it moving, he just had to keep it at high idle or else it would start to bog and shake

are my wires touching somewhere??

[redtop91]

Did you splice them Seto?

[driftin8ez]

sorry, i made it sound wrong

i had the fuel pump switch on

and my friend got the car started and got it moving, he just had to keep it at high idle or else it would start to bog and shake

are my wires touching somewhere??

Dude i am so confused right now. What do you mean your friend got the car started? Was it not supposed to start? Did he hot wire it? Sounds like your car some other issues. If you followed the guide exactly your car should act no differently than before. I say undo all you work and sort out your issues. If it's fine with no switch retrace your steps and see what you did wrong. This is on the lower end of skill needed so you should be able to get it right. GL

[S3t0_S13]

i meant, with the switch on, meaning the fuel pump shutoff, he got the car on, using the key, and it was on the verge of shutting off, but it does that sometimes

Did you splice them Seto?

yea i did

[driftin8ez]

Was looking over some of my old posts and figured this one could be worth something to others. So get out there and make your car that much harder to steal.

[S3t0_S13]

yea man its all good now, fixed the prob, thanks bro!

[homeslicej2]

What ended up being the problem Seto?

[S3t0_S13]

turned out one of my wires wasnt completely covered with elec. tape, and it was getting tiny bit of power to the fuel pump. retaped everything, since i dont have a damn solder

[homeslicej2]

Go to Radioshack or HomeDepot or any hobby store. A little 25 or 30 watt soldering iron (good for most of your automotive electrical needs) runs about $10-25 depending on brand and if it comes with accessories. Get electrical solder the, "high-tech" rosin core kind. Look up how to solder on the intraweb . I do it so infrequently that I don't have good clamps or anything to hold wires so it's a pain in the azz to solder connections especially with wire that likes to curl back up. As least crimp it with some butt connectors. You don't want that stuff coming loose when you're driving at high speed/RPM's. That could result in some serious problems.
Modified by homegirlj2 at 11:02 PM 4/24/2007

[Razi]

lol...homegirlj2Bwhahaha!!!

[homeslicej2]

^hahaha. . Courtesy of Brian (WDracing). check sig for original screen name. homeslice is something a buddy of mine called me in high school. Just kinda stuck with it.

[Soravia]

Won't thieves be able to remove the ECU cover, pull the wires and and tie them back into place?

The relay wire should be cut much further down so that people won't be able to tell which is doing the engine kill.

[R6_240sx]

Yeah, but them doing so takes time.

[Soravia]

Better safe than sorry.

I need to lock the hood.

[indians3452]

Getting my vert in a few weeks and I people keep telling me to get a kill switch. This looks like such a great, easy, and cheap security upgrade. Thanks alot. Great write up.

[driftin8ez]

No problem Glad i Can help out.

[BMAR240SX]

Hey someone needs to fix the pic's, im in need

[schanne]

^ I second that

[s14tan]

^ I second that

3rd that

[MagikDragon]

Its pretty self explanatory without pics, but here is one vroom-Chirp did, maybe this will help

http://www.nicoclub.com/articles.php?id=215575

[Asmar]

Very nice write-up.

[Rellik27]

need to get on this asap

[White Comet]

hmm to do mine, i spliced a wire right into the ecu harness for the fp relay and ran it to a switch

[slipipinoi]

yeahh picturesss. i dont want to mess up. :Pi want to do this over the weekend hehe

[SketchyRollin564]

Now that i got my car, this is definatley somthing i need to do. Anyone happen to have the pictures saved that they can bring back?

[BMAR240SX]

yeahh picturesss. i dont want to mess up. :Pi want to do this over the weekend hehe

Yea i need pic's 2, i still read pop up books because words are to complicated and boring

[BMAR240SX]

Vrooom's write up is also missing pictures