[TR] TR7 question

[DAVID MASSEY]

 This is typical of many American cars of that era as well.  There is a sensor that has two nipples as you noted.  One connects to the vacuum source and the other connects to the vacuum motor on the snorkel.  I don't know where the vacuum source is but  it might be a tee on some other vacuum line or it might be a dedicated nipple on the intake.  

I have some spare bits from a TR7, I can have a look in the morning.
 
Dave 


 
 
-----Original Message-----
From: Tom Walling <pdqtr6 at comcast.net>
To: triumphs at autox.team.net <triumphs at autox.team.net>
Sent: Tue, Jun 27, 2023 5:12 pm
Subject: [TR] TR7 question

   I'm an "old hand" with the earlier TRs, having owned a TR3 and a TR6 for many years, but I now find myself in new territory with a 1979 TR7 in my garage.       First question (of many to come) for the list: There is a vacuum motor attached to a heat sensor to open and close a flap in the air intake to prevent carburetor icing I think. I can see that the sensor connects to the vacuum motor with a rubber hose, but where does the vacuum come from? The sensor has 2 nipples, and it probably doesn't matter which is connected to the source or the motor, but what is the source of the vacuum? It must be either the intake manifold or one of the carburetors, but where?       Interestingly, the Rimmer Bros. catalog shows a short piece of tubing that they think connects the 2 sensor nipples! And of course they don't stock it anyway.      ** triumphs at autox.team.net **

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