Thermostat housing sensors
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Car: 86 WS6 5sp TA
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Thermostat housing sensors
there are two thermostat housing sensor. one is big and the other small. the small one is broken. what are they? what do they do? i'm assuming one goes to my temp gauge and the other to my choke? 4bbl 305.
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Re: Thermostat housing sensors
One of them is the coolant temp sensor for the ECM. It has wires. Its function is largely self-explanatory.
The other is the TVS for the EFE valve (heat riser). It has vacuum lines. It sends vacuum to the valve, which is between the pass side exh manifold and the Y-pipe, to close it when the temp is below warmed up, to send exhaust over the top of the motor and warm up the intake, so that it doesn't run like it's cold for as long.
Neither is directly related to the choke. The choke is electric and has no external controls, other than the relay that sends it power.
The other is the TVS for the EFE valve (heat riser). It has vacuum lines. It sends vacuum to the valve, which is between the pass side exh manifold and the Y-pipe, to close it when the temp is below warmed up, to send exhaust over the top of the motor and warm up the intake, so that it doesn't run like it's cold for as long.
Neither is directly related to the choke. The choke is electric and has no external controls, other than the relay that sends it power.
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Re: Thermostat housing sensors
OK....it's the coolant temp switch that's broken. that's why it doesn't idle down.
thanks!
thanks!
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Re: Thermostat housing sensors
It's not a coolant temp "switch"; it's the Coolant Temp SENSOR.
Get one that comes with a new wiring pigtail. (most do, AFAIK) DO NOT use crimp connectors on the wires, solder them and heat-shrink and tape them.
Probably doesn't have anything to do with "idle down"; but if it's fornicated, might as well straighten it out anyway. Eliminate one out of however many defects your situation has in effect at the same time. MUCH eeeeeeezier to troubleshoot things that have fewer individual problems simultaneously.
Get one that comes with a new wiring pigtail. (most do, AFAIK) DO NOT use crimp connectors on the wires, solder them and heat-shrink and tape them.
Probably doesn't have anything to do with "idle down"; but if it's fornicated, might as well straighten it out anyway. Eliminate one out of however many defects your situation has in effect at the same time. MUCH eeeeeeezier to troubleshoot things that have fewer individual problems simultaneously.
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Car: 86 WS6 5sp TA
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Re: Thermostat housing sensors
will do.... i balanced my tires and before i take it for a test spin i need to fix a bunch of little stuff like that sensor. THANKS!