Found This Under My Dash

[Swampfox58]

It's located between my accelerator linkage and my brake. The mounting bracket it is mounted on is sharp and was cutting into my defroster hose.
Anyone have any idea what it is?

 

[Poser]

Wide open throttle position switch.


Was used with the "emissions computer".

 

[4Cruisers]

Here's the procedure for testing the power valve control system, which includes the throttle position switch: