LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Ford >> 1980 >> Pinto Pony, 2D Wagon, Standard Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Feedback Carburetor Electronic Engine Control System >> Operation >> THERMACTOR Air Control
October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

THERMACTOR Air Control

This system is similar to the standard Thermactor air pump system, but it also adds a second air control valve (in addition to the by-pass valve), and a second exhaust check valve. Other system components include the air pump, ported vacuum switch (PVS) and the temperature vacuum switch (TVS).

Fig 1: Typical 2.3 Liter Feedback Electronic Engine Control System
G09339817Courtesy of FORD MOTOR CO.

Above 125° F coolant temperature, air pump air is routed to the mixing chamber of the dual catalytic converter. Below 125° F, the PVS applies vacuum to the air control valve which directs air pump air to the exhaust manifold to decrease HC and CO during warmup.

A catalyst protection feature is used when the TVS (on the air cleaner) senses inlet air temperatures below 49° F. This causes the by-pass valve to dump air pump air to the atmosphere (not to the exhaust manifold or converter mixing chamber).

scientia non olet · About LEMON Manuals