Interesting idea Paul H. I can only speak as to my U.S. spec '79 and have
never seen another "micro-switch" or connecting wires other than the one
similar to the reverse light one on the gearbox. The TCSA does indeed
connect from either the ZS or HS series intake and also the dizzy. If
bypassed per John Twists article the advance would have to be reduced
through retiming. BTDT
Mike
'79B
----- Original Message -----
From: "Telewest (PH)" <paul.hunt1@blueyonder.co.uk>
To: "Paul Root" <proot@iaces.com>; <mgs@autox.team.net>
Sent: Wednesday, June 25, 2003 10:45 AM
Subject: Re: TCSA
> AFAIK there is (almost) no connection between the TCSA and the gulp valve.
> They both have a connection to the inlet manifold, right enough, but that
is
> as far as it goes, the engine had the gulp valve long before it had the
> TCSA. The TSCA uses the take-off from the inlet manifold, via the TCSA
> solenoid on the firewall, to the distributor. The gulp valve uses another
> tapping on the inlet manifold. The TCSA solenoid is wired back to a
switch
> on the gearbox. Haynes is incorrect in that it shows two switches wired
in
> series for the TCSA - a microswitch with no indication of what operates
it,
> and a 4th gear only switch which is shared with the overdrive. It is
> possible that very late cars did have the microswitch in addition to the
> original gearbox switch, with the microswitch operating the TCSA in 4th
gear
> only, and the original gearbox switch reverting back to 3rd and 4th for
the
> overdrive.
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