Throttle position sensor, attached to the throttle body by two really tight screws. I guess it senses how far the throttle is open/closed.
98.5 SVT
91 Escort GT (almost sold)
96 ATX Zetec (i brake to watch you swerve)
FS: SVT rear sway bar
WTB: Very cheap beater
CEG Dragon Run - October 13-15