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[Stu.C]

Prodding and poking are additional uses to the paperweight that it is without. 

Your boundless optimism and enthusiasm is infectious. Much appreciated...

[Doctor Gollum]

You're most welcome.

If you have the ability to deprogramme the immobiliser system within the ecu, without bricking it, then good luck to you

The Omega immobiliser is pretty simple in its components, but people almost never buy or sell the complete system and wonder why it doesn't work.

Even if you're looking to use it in another car, there's no hardship in retrofitting the transponder and wiring onto any other application. If nothing else it adds a level of security to a vehicle that might not otherwise have had any.

Just be thankful it isn't more complicated... Mercedes for example require you to change the switch unit, key, engine ecu and gear selector unit(s) as a bare minimum.

[dave the builder]

It depends on a person's skill level as to if a used ,non paired ECU is a "brick" or not ,
Eproms can be transferred or cloned  .
as can components etc from the "brick" to a failed ECU .
though it is easier to just buy a paired set and hope that 20+ year old box of tricks works 

[cam.in.head]

true but not as much fun !

[Doctor Gollum]

It depends on a person's skill level as to if a used ,non paired ECU is a "brick" or not ,
Eproms can be transferred or cloned  .
as can components etc from the "brick" to a failed ECU .
though it is easier to just buy a paired set and hope that 20+ year old box of tricks works 

If you can actually buy a matched set...

[Stu.C]

If you can actually buy a matched set...

 


Let's go all the way back to summarising the first post for those at the back;

• I've got a working ECU, immobiliser ring and single chip for my engine
• I'd like another full kit as a backup, ideally with two transponder chips - but they're very scarce for the 3.0
• I'd rather not go with a less rare 2.5 kit, as we've established there's a different map in it
• I'm willing and curious enough to see if I can deal with the immobiliser EEPROM on a suitably cheap, standalone ECU

I'm in no rush. Hacking might work, it might not, but either way I will have learnt something. In the meantime, a Goldilocks full ECU kit might pop up for a fiver, ya never know...


 

[STEMO]

If you can actually buy a matched set...

 


Let's go all the way back to summarising the first post for those at the back;

• I've got a working ECU, immobiliser ring and single chip for my engine
• I'd like another full kit as a backup, ideally with two transponder chips - but they're very scarce for the 3.0
• I'd rather not go with a less rare 2.5 kit, as we've established there's a different map in it
• I'm willing and curious enough to see if I can deal with the immobiliser EEPROM on a suitably cheap, standalone ECU

I'm in no rush. Hacking might work, it might not, but either way I will have learnt something. In the meantime, a Goldilocks full ECU kit might pop up for a fiver, ya never know...


 

You're better looking for a whole omega for a tenner. 

[Doctor Gollum]

Are the 2.5/3.0 ecus self learning in the same way as the 2.6/3.2?

Although the 2.5/3.0 chips are readily swappable, Irmscher used to sell performance chips for them... Something that simply wasn't an option on the DBW

[TheBoy]

The immobiliser software isn't in the 29256 EEPROM, that much I do know, having regularly swapped out that chip.

[Stu.C]

Nope, it's in the B58253 - apparently...

[countrywoman]

So is there a way to remove the immobiliser from the ECU? I understood it was not possible.

[Stu.C]

Time will tell. 


So for the moment, I'm not gonna sit here second guessing what will or won't happen with a spare ECU that I don't yet have, or any hacking I haven't done based on research that may or may not be finished... 

[Nick W]

So is there a way to remove the immobiliser from the ECU? I understood it was not possible.

It's possible to bypass the immobiliser's requirements, so the engine runs. But if you're not comfortable with removing chips, reprogramming(which isn't like an automatic software upgrade on your phone) and refitting them, it's more trouble and expense for what is a backward step, than wiring the immobiliser properly.