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Hello, i have a 06 civic si “coupe”. Starts right up and rives perfect.. however the car seems like it looses power on go 🧐.” More sound than power” if that make sense … it will accelerate fine in Rpm and have a “BOGG” around 4k ….it was throwing a code for running to Lean/ 02 sensor replacement… i did Replaced
spark plugs, full oil change, did recently replaced both o2 sensors because check engine light.
Now still same thing also fuel pump restrainer !!!!! No power.
my next option is fuel injectors ?? What do u guys think need help 😭 engine is K20z3

 
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Do you mean it will not go past 4k rpm at all? Limp mode. Pull current faults and post them here.

 
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No it goes past 4k rpm. It hits rpm just fine
vtec fine but however the car has a bogg to it. Like its choking ... I have after market parts just as exghuast and etc. it should have more go than sound

 
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o2 sensor maker? Hondas pick for electronics (and some electrical) parts
NTK, Denso is usually OEM parts

 
Rep Power: 222

What brand of o2 sensor?