[kafoo29]

What did it end up being?
I have an 06 Tucson, same engine, same symptoms. Can't find a vac leak, cleaned my maf (reads 5.0) fuel trim is at 14.7. And like you mine sar, for almost a year after my dad passed to when i was able to put it on the road.

Are there any codes set? Any performance issues? Is the lean condition present more-so at idle or high rpm under load?

 

[kafoo29]

P0420 P0170 P0173
Since my last post I've replacey the throttle body(smoke test revealed a leak via worn bushings) which came with a new IAC and TPS. Ive changed b1s1 and am going to change b2s2 and plugs while the manifold is alreafy off. Begining to think my cat is toast

Nice diagnosis on the leaky throttle body. Is it still running lean/setting p0170/173 since you fixed that? I would make sure the fuel mixture is good and engine controls are all in working order before replacing the cat.