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Old 02-22-2003, 12:36 PM
mpnye mpnye is offline
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Join Date: Sep 2002
Location: So. Calif.
Posts: 323
Quote:
Originally posted by pmckechnie
If the EGR valve has a small piece of carbon in the valve seat, it can cause
Poor idle
Unburned fuel from misfire
Rich mixture (the exhause diluts intake air, so less oxygen + same fuel = rich mixture)
Also it will cause a failure of the EGR valve. It is tested by closing the valve and checking the vacuum and mixture, then it open the valve and checks again. It should see a change. It won't if the valve is already open and stays that way.
SO replace the valve, clean out the EGR passages, and retest.


Paul
But these plug up not stick open
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