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I HAVE A 93'BUICK,CENTURY.IT KEEPS DIEING AT AN IDLE.I RAN IT THROUGH DEQ THE NO2 WERE BARLY THERE WITH ONE SPIKE IN THE NO2. EVERY ONE SAYS ITS A VACUUM LEAK,OR CLOGGED EGR HOSE.I CANT FIND THE EGR VALVE! GOT ANY ADVICE. THANKS CARRIE!!!!
You don't say what engine you have.
But a clogged EGR hose will not cause your problem but the valve being stuck open will and so will the vacuum leak.
Need the know engine size before I can tell you where the valve is located
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