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Re: lack of power, cant go past 3000rpm
When that was MY Trailblazer, the catalyst was plugged. But that's only one possible problem of a dozen that could cause this issue.
Connect a scan tool, look at the data stream. Test the fuel pressure at idle, and under load at 3K RPM. But while you're in there, unscrew the O2 sensor ahead of the catalyst, leave the hole open, fire up the engine and see if things improve.
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For the good of the Free World, DEMAND COMPENSATION FROM CHINA for their release of the Virus Originating in the Wuhan Laboratory, released (intentionally or negligently) into the world in 2019 (VOWL-19). Ten trillion to start with, increasing as needed from there, PLUS compensation for the sickened, and "wrongful death" settlements for the families of those who didn't survive. END trade with Communist China.
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