2001 Xterra, was loosing power and then the cat caught on fire. Changed the cat and it instantly is stilling getting hot and glowing red. Any suggestions on what it could be? Possibly and hopefully just a sensor allowing too much fuel output.
New cat still glowing red.
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Which cat did you replace? Some have 2 cats some have 4. Sounds like there might be a restriction somewhere else in your exhaust system after the cat
The front driver side one was replaced. This Xterra does have 4 cats on it. Both oxygen sensors were replaced also.
It also sounds like it is sputtering and when you give it gas it is almost as if it wants to back fire.
Well, you probably need another new cat unfortunately. If it is red hot you probably melted it.
Do you have engine codes with it? Did you check manifolds for cracks when you replaced? Typically you need new manifolds as well, as they are junk and crack pretty easily. This is what throws off your O2 sensors. It's pretty rare that O2 sensors actually go bad so I doubt that is the case. I would check both sides.
If it is still bad, I recommend upgrading to the 02-04 style welded pipe manifold/cat combos. Nissan seemed to know the 99-01 manifolds were junk. Supposedly you also get a 10 HP increase.
Do you have engine codes with it? Did you check manifolds for cracks when you replaced? Typically you need new manifolds as well, as they are junk and crack pretty easily. This is what throws off your O2 sensors. It's pretty rare that O2 sensors actually go bad so I doubt that is the case. I would check both sides.
If it is still bad, I recommend upgrading to the 02-04 style welded pipe manifold/cat combos. Nissan seemed to know the 99-01 manifolds were junk. Supposedly you also get a 10 HP increase.
The cat is actually unhooked from the exhaust at this moment.
Check those manifolds closely homeboy. My cracks were barely noticeable until I removed them entirely.The cat is actually unhooked from the exhaust at this moment.
Thanks, this homegirl will check those manifolds asap. I was hoping it was going to be something fairly simple. Thanks for all the advice.
Okay Homebiscuit, let us know what you find.
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