Ok, well, on my car, up to last night, there was a T in the vacuum line.
The line came out of the intake manifold into the T. Half the T went to
the gulp valve. The other half went to the TCSA. That may be a DPOism,
but there it is.
That's gone now. The intake goes directly to the TCSA.
I think I need to take the intake straight to the dizzy, and ignore the
TCSA. The question is, what do I do about the wires? I haven't traced
them to see if the r/y goes to another switch or straight to the tranny.
If I tape up the wire at the TCSA end, do I need to worry about the
tranny end, and (if it exists) the micro switch? From the wiring diagram
(Bentley and the ebay guys), they seem to be isolated.
Paul.
Telewest (PH) wrote:
> 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.
>
> ----- Original Message -----
> From: "Paul Root" <proot@iaces.com>
> To: <mgs@autox.team.net>
> Sent: Wednesday, June 25, 2003 2:13 PM
> Subject: TCSA
>
>
>
>>So the vacuum hose goes from the manifold/gulp valve to this
>>vacuum valve/solenoid thing called a TCSA (transmission control
>>something). Can you tell I don't have John's book in
>>front of me. Oh, Moss part number, 145-740 N/A.
>>
>>There are two wires running to it, red/yellow and black. The
>>r/y goes to a micro switch, somewhere, and on the other end of that
>>switch is a yellow that goes to overdrive gear switch on the tranny.
>>Yes, even if you don't have an overdrive. I do know that's there.
>
>
>
--
Paul T. Root E/Mail: proot@iaces.com
600 Stinson Blvd N.E., Fl 1S PAG: +1 (877) 693-7155
Minneapolis, MN 55413 WRK: +1 (612) 664-3385
FAX: +1 (612) 664-4779
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