Spec Boxster Wiring Harness clean-up?

[Jittsl]

I ended up completely eliminating the immobilizer but prior to doing so it came down to only nine wires (from memory) that absolutely had to be there and they were earth and power wires (switched, unswitched and delayed -terminal 86??), a few wires that ran up to the sensor coil at the key and a couple that ran back to the ECU. All the others that came from various sensors or to hardware were redundant.

If you read down the list of them on the wiring diagram in your Bentleys you'll pretty quickly be able to put them into three buckets:-
1) going nowhere (ie you've already removed whatever was on the other end)
2) going god knows where (ie disappears into the ECU for unknown reason)
3) going somewhere obviously required (ie power, earth, decoder etc.)

1&3 are easy to deal with and 2 i tended to leave alone. If you get to the point where you don't know what you are cutting it might be worth cutting one at a time and checking you are still operational in between.

[Kroggers]

Originally Posted by Jittsl

I ended up completely eliminating the immobilizer

Any more details on how you did this, I thought the car would not start if you remove the immobilizer from the car?

[Jittsl]

There is a company here in Florida called the ECU doctors who can remove the immobilizer function from the silver box that contains the ECU. I have no idea how they do it but it allows you do away with the immobilizer box and ignition key altogether (two less things to o wrong and a few pounds saved). Brad may be able to explain it better.

[Kroggers]

Originally Posted by Jittsl

There is a company here in Florida called the ECU doctors who can remove the immobilizer function from the silver box that contains the ECU. I have no idea how they do it but it allows you do away with the immobilizer box and ignition key altogether (two less things to o wrong and a few pounds saved). Brad may be able to explain it better.

So all you do is send them your ECU and they do some magic to it? Or does it do away with the complete relationship between the parts - so they could do it to any ECU that you then install in the car?

[Jittsl]

Yes. You send them your Box and they do something and then send it back. Or they can send ou a modified one (as they did in my case). After modification there is no longer a dependency on the immobilizer at all. Mine could be fitted to any 2.5 986 and the car would start.

[Kroggers]

Originally Posted by Jittsl

Yes. You send them your Box and they do something and then send it back. Or they can send ou a modified one (as they did in my case). After modification there is no longer a dependency on the immobilizer at all. Mine could be fitted to any 2.5 986 and the car would start.

What did they charge you for the new box?

[Jittsl]

Honestly can't remember but it wasn't cheap. Drop them a line. If you can't find them Let me know and I'll find their details.