my 02 Toyota Corolla with a 1zzfe has 240k miles. It runs very well but has low power, especially uphills. What are your suggestions of things to look into? I have rebuilt the engine. I am thinking maybe a bad fuel pump or clogged catalytic converter? Thank you !

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    Depending on how much you "rebuilt" it may be a bit stiff and lacking power for the first 1000 miles or so, just like a brand new engine. But IMO this is almost impossible to answer. We don't know anything about what you did right or wrong during the rebuild, so it's just a guessing game. – alephzero Dec 22 '18 at 18:33
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    What do fuel trims do when you go WOT in gear? – Ben Dec 22 '18 at 20:03

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