Topic: Disconnected Lead
in Forum: C3 Electrical, Body and Interior
Already a Member?
Click Here to Login
Not yet a Member?
Click Here to Register for Free!
There is a sensor just below the exhaust manifold on the right side. It's a 1972 350 engine. The sensor is round with two flat male contacts. The connector was laying on top of the manifold and it is melted. Does anyone know what this is? The water temp sensor is on the driver side. So I'm stumped.
SPONSOR AD:: (Our Sponsors help support C3VR)
Lifetime MemberModerator
Duncanville, TX - USA
Joined: 11/8/2003
Posts: 20225
Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/
Am-Fm/map light National/Regional/Chapter NCRS "Top Flight"
#2-1985 Bright Red/Carmine Cp.L-98/auto
Member: NCRS, NCRS Texas, Corvette Legends of Texas
It's for the TCS(transmission controlled spark) system. It is designed to block vacuum to the distributor until the engine is at operating temp, AND the trans is placed in high gear(3rd on autos, 3rd-4th on standards). The system also includes a solenoid to control the vacuum, a switch on the trans, and a timer mounted on the firewall.
Joel Adams
C3VR Lifetime Member #56 
My Link 
(click for Texas-sized view!) NCRS
"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"
Unless you are going for NCRS, you don't need it. Just run manifold vacuum to the distributor, which is probably what you have now.
This is why I love asking questions here. You guys are REALLY helpful!
F4Gary said: Unless you are going for NCRS, you don't need it. Just run manifold vacuum to the distributor, which is probably what you have now.
Car is on lift right now so I can't check but I think you're right. Since it has probably been disconnected for a while the vacuum undoubtedly runs from manifold to distributor.
in Forum: C3 Electrical, Body and Interior
SPONSOR AD: (Our Sponsors help support C3VR)