what does this sensor do?
 

I have an 88 TII. I was wondering what the two sensors positioned on the air control valve do and whether or not they are important. The reason I am asking is because one of them fried on me last week, must have been a loose connection or something. Anyway, I've attached a picture of the sensor and the severed wire (red arrows). Do these sensors effect the temperature control of the car in any way? because my car has been running hot ever since the sensor fried (I recently changed the antifreeze and thermostat, so it isn't that). Thanks for the knowledge,

kev

the pic
 

whoops, here's the picture, the sensor is roughly in the center of the pic

Dude, what pic?

Still no pic...

There aren’t any sensors on the ACV; the only electrical connection is for one solenoid valve built into it. Can’t really help much more without that pic. :(

There are two solenoids on the acv. The front one is the Port Air Solenoid. This solenoid will be pulled in anytime the car is running, if you have over 20,000 miles on the car(there is an exception to this, but you don't wanna hear it). It sends air to the exaust ports, but is not the exclusive source of PORT AIR going to the exaust ports

The rear one is the split air solenoid. Its open when the car is in fifth gear. It ADDS additional air to the split air that goes to the catalytic converter. You have other air going to the cat thru the split air pipe anytime the switching solenoid is energized cutting off the vacuum to the switching diaphram in the acv.
If the port air solenoid is fried, just unscrew the solenoid from the body and remove the poppet and spring, then reinstall the solenoid. It'll be open all the time, just as it would be if it were fully functional.

P.S. Neither has zippity doo dah to do with the car overheating. Does your overflow tank keep overflowing? Have to fill the radiator on a too regular basis? Just overheating when sitting or also when driving down the hwy at a steady 65?

hailers
 

hailers, the overflow resevior is actually slowly loosing fluid. The only time that my car gets hot is after I get on it hard and when I'm on the highway; cruising conditions have no effect.