LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Saturn >> 1992 >> SL2 Standard >> Repair and Diagnosis >> Engine Performance >> System >> EGR Function Testing >> EGR Valve >> System Test (Vacuum Operated)
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.

System Test (Vacuum Operated)

Start and run engine to normal operating temperature. With engine at idle, push up on underside of EGR diaphragm. RPM should drop as EGR valve is opened. If RPM does not drop, remove EGR valve and check for blocked EGR passages. If RPM drops as diaphragm is lifted and EGR vacuum supply is regulated by an ECM-controlled solenoid, verify vacuum is available to solenoid at 2000 RPM and check solenoid.

CAUTION: Wear gloves if handling EGR valve when it is hot.
scientia non olet · About LEMON Manuals