Rough Idle Due to EGR Valve Sticking Open on Cadillac Seville STS

The EGR valve may stick open, causing a rough idle and/or the Check Engine Light to illuminate.

RepairPal Verified
Average mileage: 126,328 (105,986–148,000)
11 model years affected: 1993, 1994, 1995, 1996, more1997, 1998, 1999, 2000, 2001, 2002, 2003
16 people reported this problem
2 people shared problem details
rough idle and missing on take off and when i press gas
Idles up and down at times. Sometimes hard starting when cold, msut press gas when starting like one of my "old" carb. cars.
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