'Somewhere in automotive never-never land, there's a place called TPI Gulch. Walk to the edge, look down, and you'll see heaps of brand-new throttle-position sensors, mass airflow meters, ...

This overview illustration will help you place many of the different sensors used in a multipoint fuel-injection (MPFI) engine such as a 5.0L Ford or GM tuned-port-injection (TPI) 305 or 350. One ...