T Thuong New member Dec 6, 2009 #1 smog tech said it was egr valve that cause rough idle and to fail the smog test i had clean the egr and it gots a little better but still rough as in the rpm needle goes a little up and a little down
smog tech said it was egr valve that cause rough idle and to fail the smog test i had clean the egr and it gots a little better but still rough as in the rpm needle goes a little up and a little down
