sensor

[koolbrezz]

What does the sensor on the thermostat houseing do the wire is not there and nothing off firewall ethier

 

[Vbb199]

Picture?

 

[gmbellew]

What does the sensor on the thermostat houseing do the wire is not there and nothing off firewall ethier

Pic and engine details would be helpful. Best guess with the limited available information would be some sort of coolant temperature sensor for fuel injection, either TBI or aftermarket.

 

[Ricko1966]

Year,model,engine?

 

[koolbrezz]

1985 gmc c1500 305 motor carb have a sensor on top of themostat houseing with missing wire not in sight and what does it do just make dummy light work and then there is one driver side below header that probably does more any help would be good

 

[Ricko1966]

1985 gmc c1500 305 motor carb have a sensor on top of themostat houseing with missing wire not in sight and what does it do just make dummy light work and then there is one driver side below header that probably does more any help would be good

Still would like to see pics to verify. I'm going to guess you are talking about the sender for the light or gauge. It's in the head. Again guessing the one on the Tstat housing is for the dual capacity accelerator pump. Pics of the senders and your carb with the air cleaner off would be helpful. Reread your first post, it would be like me posting.What size shoes do I need. Posting. Give us enough information to help you. Year of truck,engine,transmission,CA. or 49 states. 85 CA spec would have a completly different carbureator and I don't believe the dual capacity accelerator pump.

 

[koolbrezz]

Here are the pics

 

[Ricko1966]

Here are the pics

Yep tstat dual accelerator pump sensor, nbd leave it un plugged. In the head,yep, coolant temp sensor..

 

[koolbrezz]

Make sure i got this right im not talking about the one unplug from carb in pics im talking about the one on the thermostat housing and what does dual accelerator pump sensor do thought that would be on carb im lost sorry

 

[Ricko1966]

Make sure i got this right im not talking about the one unplug from carb in pics im talking about the one on the thermostat housing and what does dual accelerator pump sensor do thought that would be on carb im lost sorry

The sensor on the thermostat housing 1 lead goes to the carb,where you are missing a plug,the other to ground. It provides a path to ground for the dual capacity accelerator pump in the carbureator. 1 shot cold,a different shot hot.

 

[koolbrezz]

Ok thanks for all your help and time

 

[David King]

If you were still running the A.I.R. system, the Smog pump and all the associated vacuum hoses and other valves and sensors, those sensors on the thermostat are TVS sensors. Thermo Vacuum Sensor. They open and close based on engine temperature to active or de-activate various valves and sensors associated with the A.I.R. system.