Question about 1999 Pontiac Montana
Check engine soon light is on went to advance and the ran computer and said replace egr valve i heard you can clean them
You would need to remove it and look into the passage that is covered in black soot. there is usually a little poppet that moves up and down to allow the exhaust gas to pass thru it, some are vacuum operated and some are electric. you can push the poppet open and scrape out the carbon with a little screw driver, generally they dont get all that pluged up on newer cars. I looked at a picture of yours at auto zone.com It appears yours is electrically actuated. If either the electric actuator or the position feedback in the valve are bad you would need to replace it. You could attempt to clean it and move the poppet up and down it could just be stuck
Posted on Jun 21, 2009
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Posted on Jan 02, 2017
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