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EGR Valve code

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Old Jan 24, 2012 | 06:31 PM
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TheWhiteBeast
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EGR Valve code
Today I got code 33 out of my truck. EGR Valve Opening Not detected...would this cause my truck to run weird? It stumbles quite a bit at start up and then it trims out and runs great. I was half expecting to see an o2 sensor code. I wouldn't think it would make the truck run worse as I have completely blocked off egr's before. But I dunno, anybody?
 
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Old Jan 24, 2012 | 09:42 PM
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critterf1
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If the ECM thinks it's closed and it's really open it will cause problems. Try cleaning the EVP sensor.
 
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