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[Dave DND]

Well, Keeping my head down but prior to driving this one I was not sure what you guys saw in them.

I am now a wiser man. And to think this is not really that nice a car I wonder what a nice ones like.

Although I`m not a fan of the Omega myself, I will agree that they are indeed very nice to drive and have plenty of grunt - you can see why Plod found them so appealing !!

However, transplant that engine into an MX5, and I for one will be queing up to take a look and have a drive !!

 

P.S. Don`t forget to post some pictures up here as the build progresses

[Marks DTM Calib]

Wiring is fairly easy as there are only a few connections the engine needs to run with a main one being the feed from the immobiliser (the immobiliser ECU will need to be kept to)

[Dave DND]

Wiring is fairly easy as there are only a few connections the engine needs to run with a main one being the feed from the immobiliser (the immobiliser ECU will need to be kept to)

Presumably you also need to retain the aerial near the igntion barrel and transponder chip from inside the original key ?

 :-?

[mdbs]

Well that sounds good, I think I am possibly worrying too much about wiring but I dont like electricity.

I have bought a Haynes manual but do you know exactly which wires I need?

And thanks for your interest.

[unclelicklug]

Can't help you much with technicalities of the wiring - I know for similar transplants I've read up elsewhere the wiring loom has been transferred wholesale including the ignition switch which gets hidden somewhere with the key permanently in place to keep the ECU happy.
But like I said don't take my word for this, there are a lot of people on here who can give you much better info'.
The purpose of my  post is to salute you and wish you luck with the conversion - hope you will give us some updates as you go along.

[2woody]

are you at the part where you need a loom making ?

when you get there, just give me a call and I'll make one for you, complete with the immobiliser part if needed. From memory, some of the early onnes use a different system.

is your MX5 a European one or not ?

[Marks DTM Calib]

Wiring is fairly easy as there are only a few connections the engine needs to run with a main one being the feed from the immobiliser (the immobiliser ECU will need to be kept to)

Presumably you also need to retain the aerial near the igntion barrel and transponder chip from inside the original key ?

 :-?

Immobiliser ECU is part of the aerial assembly (or vice versa depending on how you look at it) 

[2woody]

just to get this straight, you mean the ECU that hangs off the ignition key.

and that's the same for even the very early ones with the IR key fob. ?

I'm trying to do this in such a way as uses the GM immobiliser and the Mazda key, but it's just not coming to me at the moment. My MX-5 uses the same sort of transponder key as most of my Omegas, with the antenna wrapped around the ignition key. But if his is a Japanese one, then it's going to be a different story.

I really don't want to do the "key and transponder taped together behind the dash" thing 'cos that's just a butcher job.

[Marks DTM Calib]

just to get this straight, you mean the ECU that hangs off the ignition key.

and that's the same for even the very early ones with the IR key fob. ?

I'm trying to do this in such a way as uses the GM immobiliser and the Mazda key, but it's just not coming to me at the moment. My MX-5 uses the same sort of transponder key as most of my Omegas, with the antenna wrapped around the ignition key. But if his is a Japanese one, then it's going to be a different story.

I really don't want to do the "key and transponder taped together behind the dash" thing 'cos that's just a butcher job.

The very early setups (upto 1995) used an IR system and a relay to act as an immobiliser, this is easy to disable.

The later setup (from memory referred to as the Deadlock2) uses the transponder and immobiliser ecu with the transponder being a Philips (now NXP) contactless chip with a unique code hard programmed into it (there are some versions which can be one time programmed which some lock smiths use) which sits in the key.

The immobiliser ECU incorporates the aerial and sits around ignition barrel.

So the system works by the immobilsier ECU detecting the transponder code and comparing it to the ones it has been programmed with.

If it is recognised, the immobiliser ECU then sends a (different) code to the ecu which maintains the engine running.

Hence, the immboiliser chips are programmed to the immobiliser ECU and the Immobiliser ECU is programmed to the engine ECU.

If your Mazda key has the correct type of transponder then this could be coded (via tech 2 or other) to the immobilser ECU which is associated with the donor engine ECU.

As an addition, the immobiliser process is not overly fast and you can test this by jumping in the car and quickly firing the engine up with no transponder present as it will start and run for a few seconds before cutting out and the ECU light flashing. 

[mdbs]

thanks for the offer 2woody i  will let you know when I get there. Can you PM me your mobile?

My MX5 is a 95 UK car with no imobiliser key at all its just a simple old fashoned key.
The omega is an S reg MV6.

At the moment I am painting suspension parts to go on. Until my old caravan makes room for the Mx I cant start really.. Not long now though.

[2woody]

The very early setups (upto 1995) used an IR system and a relay to act as an immobiliser, this is easy to disable.

you're in luck - I recently scrapped one of these cars,so have an early-style ECU around, although I may need help locating it in my large box of ECUs

[mdbs]

Sorry, but was that reply for me? Lol

[2woody]

oh yes 'twas for you 

[mdbs]

Cool, I dont know if I need it but if you say I do great. Will call you soon...