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Thread: Opus Ignition System as used on XJ 12 and Aston Martins of the era

  1. #1
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    Opus Ignition System as used on XJ 12 and Aston Martins of the era

    Question:
    Re the Opus Ignition System used on my Aston Martin V8 type cars:
    1973 series 3, 1982 OI Vantage and 1980 Lagonda.
    The 1973 suffers from an intermittent problem when travelling slowly in traffic, on a round-about, etc where the motor slows, starts to diesel, then dies.

    Normally starts again. Most often occurs on a hot day.

    I am suspicious of the three wire lead from the Amplifier to the Distributor which has a three pin connector along its length. I have cleaned that and sprayed with Contact Cleaner. The later cars don’t use that connector.

    The other two cars use a continuous three core cable.

    Was there a known fault with the early XJ 12’s of that era which share the same system. The 1980 -> seem perfect.

    Thank you for any assistance.

    Cheers,
    Jim

  2. #2
    Senior Member Fraser's Avatar
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    Auto electrician called it OP(L)US (aka Hopeless) ! Changes were made, but the later system was better. Have a read here: -

    http://www.jagweb.com/aj6eng/ignition.php
    Fleet manager (!!) of: -
    XE Portfolio 180 AWD 2017
    VW New Beetle 2009
    MG Midget 1500 1977
    MG TF 135 2010

  3. #3
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    Quote Originally Posted by Fraser View Post
    Auto electrician called it OP(L)US (aka Hopeless) ! Changes were made, but the later system was better. Have a read here: -

    http://www.jagweb.com/aj6eng/ignition.php

    Thank you Fraser,
    I am trying to maintain originality - but there is a cost.
    For others reading this thread - Re-Opus (Dave Curry) in New Zealand is building upgraded PCB's for the amplifier.
    dcurry@xtra.co.nz

    Cheers,
    Jim

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