Dave U. Random snipped-for-privacy@anonymitaet-im-inter.net wrote in news: snipped-for-privacy@anonymitaet-im-inter.net:
2000 Lexus ES 300. 80K miles.
> Added Chevron Techron Fuel Injector Cleaner.
>
> Now my engine revs very low on startup.
> Sometimes stalls.
> Never had this problem before.
>
> What could have happened?
>
Which of the following haven't you replaced as per the manual instructions: Air filter, Oil, Transmission fluid?
Not an accusation you understand, but first things first.