Kill Switch

[InterCooL]

using this diagram

http://wiki.r31skylineclub.com/images/7/72...ECU_Pinouts.jpg

for the rb25det ecu, what would you have your kill switch cutting?

'start switch' sounds like a good one to me? i guess i could always go the fuel pump relay too , but if theres any fuel in the rail, it will still start

(btw i have a 3 point immobilizer and alarm, this is just extra)

[Chris Rogers]

grab the IGN feed on the ECU. that will stop it. fuel pump is another. the car WILL NOT start and run with no fuel in the rail. if it primes yes but no prime =no fuel so no go.

[GTR-32U]

howabout crank angle sensor ?

[NRV155]

grab the IGN feed on the ECU. that will stop it. fuel pump is another. the car WILL NOT start and run with no fuel in the rail. if it primes yes but no prime =no fuel so no go.

My mates RX7 got stolen with the fuel cut. Only got down the road though but still got his subs and cd's.

[W0rp3D]

does not have to be from the ecu, maybe power feed to the igniter, that way it will crank but not start and hopefully they just think the car is f**ked and leave it.

A better way to do it is a good alarm to deter them from getting in to begin with.

[gtrzilla]

wouldnt it start for like a second with fuel in the rail and then switch off

why not kill the battery/power line going to the fuel pump

[Chris Rogers]

do you know where the fuel pump relay is in those cars? above idea will not work..

[Kinks]

kill switch should be a latching relay type - ie you have to turn key to ON, hit switch, then start car. if it's just a simple switch you'll get lazy, a proper latching relay stopped my R31 from getting pinched.

[Chris Rogers]

geoff,

got a part number by chance - only way I can think to do it it with a low current latch driving a HD realy.

[SevenAngryPenguins]

anyone know which number wire to cut from the ecu to kill the ignition I ended up just cutting the fuel pump relay supply, the car will still run but only for about 5 seconds, I also tried cutting the afm ground and ignition grounds but car still ran (i dont want to chop anymore wires until i'm sure now)

I used the ecu pin out diagram from here http://paulr33.skylinesaustralia.com/

or here http://wiki.r31skylineclub.com/images/7/72...ECU_Pinouts.jpg

[Chris Rogers]

find the ECU main feeds and clip those. the ECU usually grounds internally to the case that then bolts to the car..

[SevenAngryPenguins]

that was the problem there are multiple 12V feeds (well 3 i can see straight off) to the ecu it was starting to get to a chop and try to start it sort of thing but didnt want to mess the loom up too much if someone knows which wire exactly to chop, maybe I could just intercept the eccs relay. Wires I tried were 109, 10, 26 but car can run without these surprisingly

[gumflapper]

well i spent a good part of saturday on this... and now it works... it was a bit harder then i thought it would be but in the end it was worth the work... i just got back from a "test drive" as it were and no problems what so ever... i cannot start the car unless i hit the push button and then away she goes... i can only energise the relays once the car is turned over to the "ON" position... the "ACC" wont allow power to the relays and the relays will stay energised untill the car is turned off... i chose 2 cut 16, 18 & 43... i have the option (if i decide to later) to cut more I/O to the ECU but unless i have a good enuf reason to do this, i dont think it is necessary...

ill probably post up a "how to" on how to do this later on... that is, when i get all my shit together... lol

parts costed me <$50 and a bit of electrical know how... its not as hard as it seems but it is "hard" to go cutting wires to the ECU, especially when uve just bought a PFC...