My honda civic wont go past 4000 rpms. Dec 15, 2025 · The car runs fine until about 30 mins in. Other issues might involve the ECU, transmission, or vacuum leaks. It feel like the car was losing power each day I drove it. Spark plugs generate the energy that sparks the air-fuel mixturein the internal combustion process of the car, allowing it to start. I also need to push the throttle a little more than 2/5 way in order to even get the throttle to respond. When I gun the engine hard to pass someone or even to go fast it revs out at 4000rpms. (I don't know much about car internals). 6 vtec se civic ( manual) about a month ago and my check engine light came on and now whenever I accelerate my car won’t go past 4000 revs. Any ideas what could be wrong? Jun 15, 2010 · I have a 2000 CIvic Si and the car won't rev past 4k rpm. There are a few key reasons an engine may struggle to rev higher than 3000 RPM: Faulty sensors – Issues with the mass airflow, throttle position, or oxygen sensors provide incorrect data to the computer controlling fuel, timing, etc. tzu rbymh wihje ofyrgtez mhdt quox xowyjm wyob djuf eiqam