My mechanic is stumped...
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Joined: May 2020
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My mechanic is stumped...
2006 durango. 4x4. 4.7 v8. 150,000 miles. Auto.
On flat ground runs fine. Going uphill revs way up with very little if any speed increase. If i keep the revs down there is no power to accelerate and I actually start slowing down. Sounds like a classic cat problem but I replaced cats about a year ago. Mechanic says the aftermarket cats "might" be bad and we should replace them with new ones. It's a walker which from what I understand is a good aftermarket brand. I've told him to hold on replacing for now.
No check engine light and no codes.
Has anyone else had this problem or have any other ideas as to what could be wrong?
On flat ground runs fine. Going uphill revs way up with very little if any speed increase. If i keep the revs down there is no power to accelerate and I actually start slowing down. Sounds like a classic cat problem but I replaced cats about a year ago. Mechanic says the aftermarket cats "might" be bad and we should replace them with new ones. It's a walker which from what I understand is a good aftermarket brand. I've told him to hold on replacing for now.
No check engine light and no codes.
Has anyone else had this problem or have any other ideas as to what could be wrong?
Grand Champion
Joined: May 2019
Posts: 5,134
Likes: 718
From: S.W. Indiana
2006 durango. 4x4. 4.7 v8. 150,000 miles. Auto.
On flat ground runs fine. Going uphill revs way up with very little if any speed increase. If i keep the revs down there is no power to accelerate and I actually start slowing down. Sounds like a classic cat problem but I replaced cats about a year ago. Mechanic says the aftermarket cats "might" be bad and we should replace them with new ones. It's a walker which from what I understand is a good aftermarket brand. I've told him to hold on replacing for now.
No check engine light and no codes.
Has anyone else had this problem or have any other ideas as to what could be wrong?
On flat ground runs fine. Going uphill revs way up with very little if any speed increase. If i keep the revs down there is no power to accelerate and I actually start slowing down. Sounds like a classic cat problem but I replaced cats about a year ago. Mechanic says the aftermarket cats "might" be bad and we should replace them with new ones. It's a walker which from what I understand is a good aftermarket brand. I've told him to hold on replacing for now.
No check engine light and no codes.
Has anyone else had this problem or have any other ideas as to what could be wrong?
It could be a timing chain jumped a tooth but generally, the 4.7 will hammer the valves if it jumps time. Before I replaced the cat., I'd hook a vacuum gauge to the engine and see what it pulls. With the recent warming of the weather, you might have rodents in the exhaust stopping your gasses from getting out rather that a bad cat.
Registered User
Joined: Jun 2011
Posts: 19
Likes: 0
From: New Yawk
2006 durango. 4x4. 4.7 v8. 150,000 miles. Auto.
On flat ground runs fine. Going uphill revs way up with very little if any speed increase. If i keep the revs down there is no power to accelerate and I actually start slowing down. Sounds like a classic cat problem but I replaced cats about a year ago. Mechanic says the aftermarket cats "might" be bad and we should replace them with new ones. It's a walker which from what I understand is a good aftermarket brand. I've told him to hold on replacing for now.
No check engine light and no codes.
Has anyone else had this problem or have any other ideas as to what could be wrong?
On flat ground runs fine. Going uphill revs way up with very little if any speed increase. If i keep the revs down there is no power to accelerate and I actually start slowing down. Sounds like a classic cat problem but I replaced cats about a year ago. Mechanic says the aftermarket cats "might" be bad and we should replace them with new ones. It's a walker which from what I understand is a good aftermarket brand. I've told him to hold on replacing for now.
No check engine light and no codes.
Has anyone else had this problem or have any other ideas as to what could be wrong?