The EGR valve may stick open causing a rough idle and the Check Engine Light 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.
Check Engine Light/Rough Idle Due to Stuck Open EGR Valve on Chevrolet S10
Average mileage: 135,000 (135,000–135,000)
Exhaust & Emissions affected: 4.3L V6
2 people reported this problem
1 person shared problem details
1994 Chevrolet S10135,000Visitor
Code 32. Rough idle and stalls. Runs fine then horribly for a few moments then runs fine then horrible again. Etc..
my 01 s10 blazer has rough idle but i can unplug egr valve and it idles good ive already repl...
The distributor may develop internal faults. This can cause a rough running engine or stalling...
Illumination of the Check Engine Light may be the result of a loose or worn gas cap.