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2000 , 1997, & 1992 Devilles
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Discussion Starter #1
My 2000 deville a problem with 5 of the six egr ports being clogged only number 4 is open, and my engine misfires Po300 & po304 simultaniously. I need to get to the upper plenum and unclog the ports but, im not sure exactly where its located or what it looks like. I think it may be located around the egr and manifold but im not sure.
 
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