Hi Peter,
Thanks for the info.
Mine has a separate amplifier, but I don't think it is
Lucas, but in the distributor is an 'optical pickup',
part of which comes higher than the base of the rotor,
so I don't see how the plastic guard would fit. Also I
don't see this setup in any of the catalogues/manuals etc.
Mine is a 1978 MGB Roadster, by the way.
Anybody else got this arrangement or know about it?
Thanks,
Alan B.'
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From: Peter Schauss x 2014
To: mgs
Subject: Re: Still won't idle
Date: Friday, October 17, 1997 4:54AM
>
> I'm guessing you have a late model with electronic ignition. I had the
> same problem with my last smog inspection. I also replaced all plugs,
> wires, cap, and rotor at the recomendation of the mechanic. It had not
> been very long since the last change of these same parts. Finally got to
> pass smog, but still had the rough idle. I couldn't give up untill I
> found the problem. It turned out to be the bracket that supports the
> optical trigger inside the distributor. It sticks up high enough that
> each time the rotor came past it would arc to ground. So I wrapped the
> bracket with electrical tape. Presto, it ran like a champ. More
> permanent fix was to dip the bracket in liquid rubber. The same stuff
> you dip your tool handles in. Available at most hardware stores. You may
> have to dip it several times to build up a good insulation. Dont forget
> to mark where the bracket is, or it will foul up rotor timing in
> relation to the terminals in the cap. Good luck. Hope it works for you
> also.
My distributor has a plastic cover, called an anti-flash shield - I
believe, which separates the pickup coil and related components from
the rotor. I am still using the original Lucas electronic ignition
system
with the separate amplifier mounted on the inner wheel well.
Peter Schauss
ps4330@okc01.jccbi.gov
schauss@worldnet.att.net
1963 Austin-Healey 3000 Mk II
1980 MGB
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