2001 Chevrolet S10 Q&A

2001 Chevrolet S10 Question: egr not working

my 01 s10 blazer has rough idle but i can unplug egr valve and it idles good ive already replaced egr but still has same problem what could it be? -
Answer 1
usually the egr picks up carbon and the valve remains open causing a vaccuum leak that makes the idle very erratic. Roy -
Comment 1
i've already replaced egr and it still giving code egr closed performance, what could it be need help!! -
Answer 2
I think Roy is correct. The valve might be open due to carbon deposit, ECM or wiring problem. There is a new style gasket developed with a fine screen which would stop the bigger pieces of carbon deposits to enter the valve. Faulty pintle position sensor could also keep the valve open. Zee -
Comment 1
already replaced egr and still giving code egr closed performance ,what could it be,please help!! -
Comment 2
Faulty pintle position sensor in the new EGR valve could keep the valve open. Zee -
Answer 3
Check for vacuum leaks? This egr should be electronic. I would also check fuel pressure as well. Do you have any check engines lights on? If so, what are the codes? -
Comment 1
already replaced egr and still giving code egr closed performance, what could it be ,pleasae help!! -