1988 trooper 4 cyl i-tech 2600 [i think] the egr tube that runs from the ex. manifold to the back of the in. manifold . mine is loose on both ends even though the nuts are tight. it feels like there is some blow by on the ex. side. what type of fitting should be on the ends and could this be the reason for failed emission test here in ga. excessive nox.

there will always be a muddy spot in my driveway