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Old 10-01-2022, 10:26 AM   #43
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Originally Posted by D Gardiner View Post
If I wanted to fly up the mountain at 65 in a lower gear, revving the engine to 4000 rpm i could have. But why!
To go with the flow of traffic.

Passing someone going up hill and have them pass me on the way down, over and over again is just un-nessessery.
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Old 10-02-2022, 09:10 PM   #44
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Originally Posted by sbleiweiss View Post
I'm not sure of the order of things, but here is what happened. First thing we noticed was new noises. Took to truck shop and diagnosed as driver side exhaust manifold leaking. Replaced it. On next trip had noticeably reduced power and gas mileage. And some similar noises were back. Got back and diagnosed second (passenger side) exhaust manifold leaking. Replaced it. At a couple of points they tested back pressure from the cat but it passed. Finally after overheating and a breakdown diagnosed clogged cat. Replaced it. All is good.

What I think happened is cat went bad first and caused the two manifolds to fail. Should have been caught earlier and probably unnecessarily caused the second manifold to fail. But could it have been the manifolds first and somehow they clogged the cat? Could be I suppose but too coincidental that they both failed so close together.

I think the reason the bad cat passed back pressure tests was because there was one or more leaking manifolds at time of test. Seems likely that that would invalidate test.

Hope that answers your question.
Yes. Thank you very much.
Larry & Sheree & KD the CAT
2009 Holiday Rambler Admiral 30SFS Lewis County, Wa.
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