I remember my rover use to have one behind the ashtray, a ford had one in the boot. just wondering if the octavia has one hidden somewhere in the car that could be turned on and off at a flick of a switch?

IIRC it cuts out the fuel automatically, and you can only reset it with VAGcom. Well not only it cuts the fuel, it disables the door locks and power steering too, I think.

Fuel cutting on crash is present only on petrol engines.

Why? Won't the immobiliser do you? :confused: My old Xantia had one just under the plenum panel - DAMHIKT

Why? Won't the immobiliser do you? :confused:

immobiliser is fine if the thieving scum dont have your keys. just looking to up the security.

Fit a remote switch into the ECU fuse line. There's some place to slide your fingers in beneath the driver's side knee storage box and the dash, you can epoxy it in place there.

thats what i was thinking

Isnt it on the panel by your right foot?

If you must put a switch in the earth not the live, much safer for the ecu. But when you switched it off you lose all stored ecu data.

I think the ECU uses eeproms, which are not volatile.

Just thought of a 2nd option, the low pressure fuel pump in the tank. But in diesels there's still plenty of fuel in the filter and pipes for driving around for at least a mile.

or just pull the fuse out. other option replace it with a 1amp fuse, dunno if it would pop quick enough.

Don't mess with the ECU.

As Lummox said, the ECU hold volatile, learned data that if lost when you remove its power. Whilst the programming might be held in EAROMS, data such as throttle body adaption is held in RAM (battery backed until you disconnect it).

I disagree with Lummox on disconnecting the earth. It is safer to remove the battery earth when working on the electrical system, but here we are only considering disconnecting the earth to the ECU. We are creating a earth fault situation where some of the inputs are still providing power.

IMO, the only legitimate reason for adding a fuel cutoff switch would be for racing, in which case you would want to add a fuel cutoff valve.

Just leave a non coded spare key downstairs, they'll get this first without having to go upstairs, by the time they've worked it out they'll run.

Yeah, that'll confuse them alright. The engine will start OK, then cut out. Unfortunately they are IN your car now, feeling frustrated and angry. I can see them being a bit destructive, to say the least.

I remember my rover use to have one behind the ashtray, a ford had one in the boot. just wondering if the octavia has one hidden somewhere in the car that could be turned on and off at a flick of a switch?

Rover's ones was always good to switch off! Good april fools day joke....

James.

Just leave a non coded spare key downstairs, they'll get this first without having to go upstairs, by the time they've worked it out they'll run.

have seen some joke ones shaped like the skoda (vag) key fob that when you press the button to pop the key out you get an electric shock

That'll teach them.

Is there not a fuse for the fuel pump? I'd have thought if there was you could drill the fuse to break the connection and have a switch wired to it with the appropriate sized fuse wired on the return line to the fuse from the switch?

Beat me to it.