I want to address the RPM drop issue in my Honda Civic 2004 VTi Oriel Prosmatec. The RPM stays at 800-900, and there is a delay in RPM when I rev the accelerator from stationery position. Additionally, the battery sign is continuously blinking. An electrician checked the wiring under the dash, and after doing so, the RPM came back to 1000 for a while but cant fix the issue. However, he is unsure whether the problem originates from there or not.
Recently, I have cleaned the throttle body, replaced the spark plugs with iridium ones, changed the air filter, switched to Valvoline engine oil, and cleaned all the fuel injectors.