LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Saab >> 1987 >> 900 SPG >> Repair and Diagnosis >> Engine Performance >> System >> EGR System >> Testing >> EGR Valve >> Two-Port & On-Off
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Two-Port & On-Off

With engine idling, disconnect EGR valve vacuum hose at thermostatic valve. Connect vacuum pump to hose. Operate vacuum pump to create a vacuum within EGR valve. Engine idle should become rough. Replace EGR valve if idle was not affected.

scientia non olet · About LEMON Manuals