LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Cadillac >> 1989 >> Seville STS >> Repair and Diagnosis (Single Page) >> Engine Performance >> System >> EGR System >> Operation >> Digital EGR System
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Digital EGR System

The digital EGR valve is designed to accurately supply EGR to engine, independent of intake manifold vacuum. The valve controls EGR flow from exhaust to intake manifold through 3 orifices, to produce 7 different combinations. When a solenoid is energized, the armature with attached shaft and swivel pintle is lifted to open the orifice.

Fig 1: Digital EGR Valve
G55855Courtesy of GENERAL MOTORS CORP.