My TCSA has 2 ports 1 vertical and the other horizontal pointing toward the
front. The horizontal port is vented out the bottom of the solenoid when not
actuated and connects to the distributor. The top port is connected to
manifold vacuum. What was happening was that, when the lines were reversed,
vacuum would build in the advance line and not vent, keeping the spark
advanced and idle high. The other line would have been a vacuum leak, but
the "natural richness" inherent in the ZS carb masked any lean running
problems. When I corrected the lines, the idle did drop about 50 rpm and
doesn't bump up to 1200 after running in 4th and coming to idle.
----- Original Message -----
From: MGBnutt@aol.com
To: sgorr2@comcast.net ; paul.hunt1@blueyonder.co.uk ; mgs@autox.team.net
Sent: Tuesday, June 08, 2004 10:58 PM
Subject: Re: TCSA & Vacuum advance woes
Now I'm a little confused...I thought the solenoid was either open (in 4th
gear) or closed. How does hooking up the vacuum lines reversed change its
operation? In any case, I'm planning on reconnecting the lines to my
solenoid (disconnected by a PO) again and I'm now wondering which way round
it should be connected? Does the port pointing at the manifold connect to
the manifold and the port pointing at the distributor connect to the vacuum
advance? That seems the logical choice. Or...should I bypass the solenoid
completely and just go directly to the distributor?
Any advice appreciated!
thanks,
donny v
78 MGB
In a message dated 6/8/2004 10:50:29 PM Eastern Daylight Time,
sgorr2@comcast.net writes:
Thanks again for your accurate descriptions of how things are supposed
to
work. I pulled the TCSA solenoid off of the pedal box to clean and
examine
it and found it to be working properly. What wasn't working properly was
the
"volatile RAM" that I apparently have in place of actual grey matter. I
had
switched the vacuum lines around and thereby allowing the manifold to
vent
and capturing vacuum in the line to the distributor. Idle is now stable
and
set to specs. Thanks again. This list is invaluable
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