What is this ?
Thread Starter
Instructor
Joined: Apr 2016
Posts: 207
Likes: 31
From: Fishers Indiana
What is this ?
74 convertible. Base engine, no p/s, no p/b, no a/c.
What is this component (see pic attached).
Passenger side, right above #2 cylinder, 3 wire connector plugged into back. Vac hose running to carb. Another port not capped.
Trying to figure out what it is and whether that nipple port is meant to be open
What is this component (see pic attached).
Passenger side, right above #2 cylinder, 3 wire connector plugged into back. Vac hose running to carb. Another port not capped.
Trying to figure out what it is and whether that nipple port is meant to be open
Race Director
Joined: Apr 2011
Posts: 11,183
Likes: 3,334
From: North of Toronto - Ontario
I'll go with the TCS solenoid.
(Transmission Controlled Spark, part of GM's power reduction system)
It would delay the vac-advance to the distributor until the engine reached a certain temp and/or the trans was in high gear
If you do a search there will be loads of info, just remember different years had slightly different systems (especially 71) and sb and BB were different
HIH
M
(Transmission Controlled Spark, part of GM's power reduction system)
It would delay the vac-advance to the distributor until the engine reached a certain temp and/or the trans was in high gear
If you do a search there will be loads of info, just remember different years had slightly different systems (especially 71) and sb and BB were different
HIH
M
Burning Brakes
Joined: Oct 2013
Posts: 1,113
Likes: 520
From: McClellandtown, Pa.
That is the transmission control spark solenoid. (TCS). The hose coming from the carb is correct. According to the 73-74 Judging Guide there should be a black hose going from the front of the white plastic T running back along the valve cover to the vacuum diaphragm on the distributor.
Regards,
Jim
Regards,
Jim
Thread Starter
Instructor
Joined: Apr 2016
Posts: 207
Likes: 31
From: Fishers Indiana
thanks for the replies so far.
any pointers/pics/diagrams showing what port on the distributor is the 'vacuum diaphragm' ?
any pointers/pics/diagrams showing what port on the distributor is the 'vacuum diaphragm' ?
That is the transmission control spark solenoid. (TCS). The hose coming from the carb is correct. According to the 73-74 Judging Guide there should be a black hose going from the front of the white plastic T running back along the valve cover to the vacuum diaphragm on the distributor.
Regards,
Jim
Regards,
Jim
Burning Brakes
Joined: Oct 2013
Posts: 1,113
Likes: 520
From: McClellandtown, Pa.
Jimmy
Last edited by Tooch1; Jul 4, 2016 at 11:41 PM.
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