Poor MPG, pinging, exhaust smells rich on startup, no codes

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shinckley08

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Joined
Jul 18, 2023
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Location
Boise, ID
2013 LR4 5.0 169k miles
Pinging on light acceleration especially under a load like going up a hill. I did a 5 hr highway drive and got about 14mpg, I’m used to 17+.

Recently replaced the evap valve because I was getting a fuel smell on hot days when at idle also, that seems to be gone but no change otherwise

Replaced plugs

About a month ago the cats were smelling for a day or two, but that went away. I assumed it was from idling too long and not driving enough to get them hot. Didn’t think much of it but now am wondering if running rich has ruined the cats.

No codes, no perceivable loss of performance.

I don’t have a gap tool or know what I’m doing but it seems to me like it’s running rich, and I’m wondering if with my cheap odb2 dongle if I can do my own diagnostics. Forums and and searching points to bad cats, bad 02 sensors, issue with cam phasers, cracked manifold, or a leaking injector, or a combination of these things.

Long short if anybody has any advice on diagnosis I’d happily take it. It’s my daily driver and I’m getting around 9mpg in town $$$

The only thing I looked at was #2 O2 sensor voltage.
 

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