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Pic 1 is the TCS solenoid, would prevent timing advance until the car was warm, part of an entire system
Pic 2 is the vent for the wiper door (supposed to be open)
Pic 3 ...I think should be the plug for the TCS but on mine (72 so it was different?) there was a tan wire and the black and blue wires went into the same spade
M
Last edited by Mooser; Aug 14, 2015 at 05:35 PM.
Reason: Un-Changed my mind about #3
Hi 70,
Here's a picture of a typical TCS configuration on a 70 sb.
I believe the solenoid in your picture may be mounted backwards.
In pic #3… that wire comes around and plugs into the back end of the TCS solenoid… see my pic.
Regards,
Alan
This pic is from the Dobbins 68-72 Fact Book.
Note hose from distributor advance to side port on solenoid and from front port to nipple on carb.
As everyone else has said, it is the TCS solenoid and yes the green wired plug goes to it. Because the rest of the system is most likely not connected or operable you can remove the TCS solenoid if you like. (Hang on to it though, if still functional it is a nice part to have.)
The TCS system is comprised of a switch on the transmission, a relay on the firewall, a temp sensor in the passenger side head and the solenoid on the intake manifold.
The steelwire braided vacuum line going from the carb to your distributor defeats the intent of the TCS system.
Thanks for the detailed replies, fellas. Much appreciated.
It does appear that mine is mounted in a different orientation than in the Dobbins book.
I wonder if it was 'fiddled' with in the past (as evidenced by the braided line) either because the solenoid broke or for a performance improvement.
Last edited by 70 Sting; Aug 15, 2015 at 09:13 AM.
Hi 70,
I'd think either one of your thoughts might be true.
Many people didn't quite understand the way the TCS system was supposed to work or what it's various parts that Revi listed did… so they disconnected what ever they saw hoping for improved performance.
Regards,
Alan
Just adding that braided line covering to the vacuum advance hose has to be worth probably 50 horsepower.
Engine Part Identification
