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?
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2001 Chevrolet S10 Question: egr not working
Answer #1mastertech6371 January 12, 2011, 12:23Master
usually the egr picks up carbon and the valve remains open causing a vaccuum leak that makes the idle very erratic.
ReplyVisitor, January 29, 2011, 18:13
i've already replaced egr and it still giving code egr closed performance, what could it be need help!!
ZeeTech January 12, 2011, 12:53Master
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.
ReplyVisitor, January 29, 2011, 18:15
already replaced egr and still giving code egr closed performance ,what could it be,please help!!
ReplyZeeTech, January 29, 2011, 21:07Master
Faulty pintle position sensor in the new EGR valve could keep the valve open.
Answer #3candaautomotive from C and A Automotive, January 12, 2011, 14:07Journeyman
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?
ReplyVisitor, January 29, 2011, 18:17
already replaced egr and still giving code egr closed performance, what could it be ,pleasae help!!