Emerald transplant... loom replacement?

[Pupp]

Anyone know if the oem fuel/ign wiring is carried on a separate loom that is anything like removable as a unit when replacing the ECU? Or is that too much to hope for and there's a need to slash 'n' burn?

[Graham]

When we originally did the one in my chim the emerald wiring piggyb backed into the existing engine bay loom. DOing that allowed a conversion back to lucas by re connecting one wire..

although to answer your question there is a largely separate engine bay loom. on the lucas/ dissy system the ignition side of it is also totally separate from everything else.

Edited by Graham on Monday 15th October 22:35

[Pupp]

Graham said:

When we originally did the one in my chim the emerald wiring piggyb backed into the existing engine bay loom. DOing that allowed a conversion back to lucas by re connecting one wire..

although to answer your question there is a largely separate engine bay loom. on the lucas/ dissy system the ignition side of it is also totally separate from everything else.

Edited by Graham on Monday 15th October 22:35

I know some have done this but must admit I wondered why? Assuming the new ECU functions as it should, then I can't see why you'd want to swap back after investing the time and money? Did you ever swap back or did the old wiring prove to be redundant?

Thanks for the info

[350Matt]

I did my initial Emerald conversion by lopping off the old ECU plug and using most the TVR loom.
This turned out to be a mistake, while the car ran fine, it was prone to the odd speed signal noise problem.

when I upgraded to a later emerald ( I ran the units in one form or another for 7 years) I was having more noise problems and ended up stripping all of the old loom out and making a new one from scratch.

theres was so much dead wire, coiled up in the old loom with no twisted pairs or separate ground leads either.

Basically strip it all out save a few kilos in dead loom and start from the beginning its the best way.

Matt