XJS ( X27 ) 1975 - 1996 3.6 4.0 5.3 6.0

1985 V12 HE Injector Harness Questions

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Old Jan 26, 2024 | 11:22 PM
  #1  
asingleton's Avatar
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Default 1985 V12 HE Injector Harness Questions

Hi Everyone,
In taking off the injector rail and removing it from the car, I noticed that the rail has two extra EV1 connections. I assume cold start injectors perhaps as they bolt into the intake manifold on each side?
As as you all know, once you start a project and get into the "V" you find other things that can / should be done. So my injector harness is not looking as it did when it left the factory, but I notice it has 14 connections, not 12.
12 are a beige / grey colour and the two extras that go to the intake manifolds are blue.
Looking at replacement harnesses online, i.e. SNG, etc, they only seem to have 12 connector harnesses.
Was my harness modified at some point, or am I looking at incorrect replacement harnesses? (Yes, you smart guys are all going to say make your own harness, but I want my car back on the road sooner than that task would take me).
What am I missing here? Am I looking for a 14 connector harness? (Pic attached showing the blue EV1 connectors top and bottom, in addition to the 12 EV1 connectors for the main injectors).


Thank you,
Adam
 
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Old Jan 27, 2024 | 12:50 AM
  #2  
Grant Francis's Avatar
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From: Adelaide Stralia
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HAHAHA welcome to my/our world.

Make your own, simple enough, time consuming but.

Jaguar played with Cold Starts throughout the 5.3 life, including PreHE. Depending on mood?, market requirements, and who knows what, they fitted, deleted them all over the years.

Most, if not nearly all, owners have removed them.

The 2 extra plugs on the loom, Blue, are the Cold Starts, spot on.

Aftermarket caters for NO Cold Starts as you have found.

Dodgy EFI looms are 99% the cause of V12 reliability issues.
You are in there, bite the bullet, do it now and repeat in 30 years.
 
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