Can someone tell me where the red wire goes that leads from the Transmission Control Spark Solenoid? I've got a copy of the assembly manual but that part of the book isn't legible. Also, can someone please tell me what the purpose of this is? Thanks in advance, Chris
TCS Chris, The transmission controlled spark advance does not allow vacuum advance in 1st and 2nd gear. When the trans upshifts to 3rd, normal ported vacuum advance is allowed. The system consists of a solenoid valve, an oil pressure operated switch (Transmission), and an electrical harness connecting the two. The solenoid valve is normally open passing vacuum, but closes off when energized. One end of the solenoid would get switched 12 volts, through the solenoid, and then to the switch on the side of the transmission. The oil pressure switch is normally closed energizing the solenoid and cutting off vacuum advance. When the trans shifts to 3rd gear, the switch opens, cutting off the 12 volts to the solenoid and allowing normal vacuum advance. The whole system is used with leaner jetting in the carb and retarded initial timing for better emissions. Unless your going the Concourse resto route, you're better off having ported vacuum advance full time. Just eliminate the solenoid(use the hole for an Autometer temp gauge) and run a hose from the ported nipple on the carb to the advance cannister on the distributor. Hope that helps.
Re: TCS Front drivers side of the intake manifold. The vacuum solenoid is actually a thermo-vacuum switch. I unscrew them out of the intake and use the threaded hole for a real temperature gauge sender.
