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Re: GM Nox/Negative Backpressure EGR Smog Failure
Posted to Technical Discussion Forum on 11/7/1999 1 Reply

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Hi Bill Did you check the EGR passages for restrictions? Have you seen the EGR passage cleaner that WYNNS has, we have been using it for a couple of months now and it seems to do a good job. The reaso... Login to read more.

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