Rough Idle and Check Engine Light Due to Sruck Open EGR Valve on GMC Sonoma

4.3L V6 multi-port FI only
The exhaust gas recirculation valve (EGR) may stick open causing a rough idle and the Check Engine Light to illuminate. Our technicians tell us that a piece of carbon may become stuck in the valve causing this problem. Cleaning the valve will usually correct this condition, in some rare cases the valve will need to be replaced.

RepairPal Verified
Average mileage: 205,000 (205,000–205,000)
2 model years affected: 1994, 1995
3 people reported this problem
1 person shared problem details
1995 GMC Sonoma205,000
Rough Idle. Have to have distributor checked. The carbon issue is alway and issue. I even got a gasket from napa that had screen in it and it is still causing this issue. Please contact me if someone has a real fix. rfnut2001@yahoo
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