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2nd Gen Ram Tech1994-2001 Rams: This section is for TECHNICAL discussions only, that involve the 1994 through 2001 Rams. For any non-tech discussions, please direct your attention to the "General discussion/NON-tech" sub sections.
I was just about to go ahead and do it and if you don't mind me asking what's the easiest way to get to it since it seems a little awkward and hard to get to it
The cat would certainly be a first check... with a bad plenum, you can change the cat as often as spark plugs.
You can get to the CPS from below or above... both are difficult... I have longer arms, and found it easier from below, as I hate laying up in the engine bay.
From below the distance of restrictive area is shorter.
At 210k, it should be about at the end of it's third cat... 2nd at very least, with a good plenum all along (and that is very unlikely).
Assuming the factory cat was replaced due to the service bulletin or any other reason, and the replacement was not a generic part, the cat should never have to be replaced so long as the emissions system is working properly and the plenum has been serviced.
