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Old 09-10-2014, 12:34 PM   #121 (permalink)
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Quote:
Originally Posted by andrenoites View Post
Ok I guess I'm shopping now

I'm thinking in purchase these two itens:

Universal Car 3 Meters Wiring Loom Harness Kit with Fuse and Relay Switch 12V

Electronic Specialties Fuse Buddy Tester DMM ATC 303B | eBay

With this and a bit of soldering can I workout something for my car?
I just want to have one button so that when it's pressed it shut down the engine and then when I release my finger it reconnects the injector so I can bump start that sucker again.

2000mc in your installation the green button is to start the car (starter) or just to reconnect the circuit?

See you soon!
I used a relay with normally closed terminals, I'm not positive, but that relay looks like it's only a 4pin w/ normally open contacts. The fuse buddy looks like a nice setup and would be easier to use than what I did. The only reason I didn't use it myself is because I didn't think my fuse block cover (underhood) would clear it.
My green button is separate from the injector kill, and just operates the starter

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Old 09-10-2014, 03:05 PM   #122 (permalink)
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Quote:
Originally Posted by MetroMPG View Post
The circuit you want to mod is the one with the #7 fuse for the ignition coils (under dash fuse block). You already knew that, right?

You can do this with 3 wires, some spade connectors and a normally closed momentary switch.

You're going to modify the #7 circuit, where pushing the button acts as though you've effectively pulled out the #7 fuse (as long as you're holding the button).

What I did was:

1) Made up a pair of wires with soldered on spade ends (male) that were the same size as the fuse spades.

2) Pulled the #7 fuse and inserted both of the wires with male spades into the fusebox slots where the fuse was.

3) Connected the fuse to the end of one of my wires (added a female spade connector to the wire).

4) Connected the momentary switch to the end of the other wire that's inserted in the fuse block.

5) The third wire goes between the other side of the momentary switch to the other side of the fuse (another female spade connector).

Locate the switch somewhere handy (gear shift), tape up all the connections, and presto! +15 MPG.

I've read there are "add a circuit" kits you can buy that save you having to make up your own spade/wire connections, and includes a handy slot to house the fuse, but didn't look into that.
Wait so your just cutting power to the coils? Would a fuse buddy with a relay do the same job?

[Edit]: Wouldn't cutting power to the coils still allow fuel to be sprayed into the cylinders? Due to their being no spark while the engine is dying? Just wondering.

[Edit again]: Now that I'm reading it again I understand what to do completely. My question about spraying fuel into the cylinders still stands however.

Last edited by Baltothewolf; 09-10-2014 at 03:14 PM..
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Old 09-11-2014, 05:49 AM   #123 (permalink)
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Ok guys, Quiz Time:

Which fuse shall I connect to the switch?

https://drive.google.com/file/d/0B6w...it?usp=sharing


The car have a petrol engine

Tks
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Old 09-11-2014, 08:07 AM   #124 (permalink)
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Won't be asy to kill the engine just by hooking to the fuse. You can cut power to ECU but that can cause some trouble and trhrowing codes.
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Old 09-11-2014, 09:48 AM   #125 (permalink)
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But there are other critical things like injectors and coils that can be cut off, not just the ECU.

Baltothewolf- I haven't looked it up, mainly because no OEM is going to explain how to make a kill switch. But the ECU looks for a lot of information and will shut down the engine if it isn't happy with what it sees. That's why I tested the fuse method, to see if it shut down well or shut down and threw a CEL. Opening that circuit made it lose spark, which shut my engine down with no CEL and I got a smooth bump start. Now when I get the time I'll put everything together sand start using it for real.
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Old 09-11-2014, 10:09 AM   #126 (permalink)
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Quote:
Originally Posted by Baltothewolf View Post
Wait so your just cutting power to the coils? Would a fuse buddy with a relay do the same job?

[Edit]: Wouldn't cutting power to the coils still allow fuel to be sprayed into the cylinders? Due to their being no spark while the engine is dying? Just wondering.

[Edit again]: Now that I'm reading it again I understand what to do completely. My question about spraying fuel into the cylinders still stands however.
Yes it would still allow some fuel into the cyl. Not alot but some. Thats why I recommend killing the injector not the spark.
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Old 09-11-2014, 10:30 AM   #127 (permalink)
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Originally Posted by Insight for life View Post
Yes it would still allow some fuel into the cyl. Not alot but some. Thats why I recommend killing the injector not the spark.
I can't seem to find a single thread on how to kill the injectors. Only talk about having been done it.
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Old 09-11-2014, 10:45 AM   #128 (permalink)
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Quote:
Originally Posted by Baltothewolf View Post
[Edit again]: Now that I'm reading it again I understand what to do completely. My question about spraying fuel into the cylinders still stands however.
If you're concerned the injectors may spray added fuel before the engine stops, search on IC: there's a second, more complicated method that involves wiring the kill switch to 3 relays (which you add) on the fuel injector circuits for each cylinder instead of killing spark via a simple switch.

I didn't think it was worth worrying about. Caveat Kill Switchor.
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Old 09-11-2014, 10:46 AM   #129 (permalink)
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Originally Posted by Baltothewolf View Post
I can't seem to find a single thread on how to kill the injectors. Only talk about having been done it.
yeah I couldnt either when I was looking to install mine. I will try to help you out a bit when I get a chance to take some pics.
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Old 09-11-2014, 10:51 AM   #130 (permalink)
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Quote:
Originally Posted by MetroMPG View Post
If you're concerned the injectors may spray added fuel before the engine stops, search on IC: there's a second, more complicated method that involves wiring the kill switch to 3 relays (which you add) on the fuel injector circuits for each cylinder instead of killing spark via a simple switch.

I didn't think it was worth worrying about. Caveat Kill Switchor.
This is true. I would go with the spark kill method if you dont really care either way. I have never heard of anyone actually running into problems because they killed spark instead of injectors, only potential for problems.

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