Need a little help with diagnostic, trying to fix it

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So what my es300 2003 is doing is it takes a little more rpm to go the same speed, and a noticeable about more press of the pedal. 


I replaced the fuel filter, cleaned the fuel injectors with gas cleaner, and gave it an oil treatment. 


It also shifts weird because of it, since the ecu is trying to Rev match but it's not used to what's going on. 


I've been trying to figure it out myself, I'm thinking maybe just replace injectors or a throttle position sensor. But the position sensor wouldn't explain the lack of power as well. And the lack of power is inconsistent. Sometimes there's power, sometimes there isn't power. 


Any help appreciated!! 

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Is your check engine light on? This could be a transmission issue. How does your transmission look?

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