How to Deal with a Rich Fuel System?
2 Answers
Use high-efficiency fuel additives like Mafuduo tablets to improve fuel cleanliness, help clean oil colloids in the fuel, and promote combustion to remove carbon deposits. If the above methods are ineffective, it is recommended to visit a 4S repair shop for inspection.
I've worked in repair shops for over 20 years and seen many cases of rich fuel mixture issues. The main causes are usually a clogged air filter restricting airflow (making the computer compensate with extra fuel), faulty oxygen sensors sending wrong data, or leaking fuel injectors dumping too much gasoline. Start troubleshooting by replacing the air filter - it's cheap and easy. If the problem persists, scan for trouble codes like P0172 and inspect sensors/injectors - replace aged sensors and clean/replace injectors as needed. Check fuel pump/regulator if pressure is too high. Don't delay repairs - rich mixtures spike fuel consumption, reduce power, and cause carbon buildup that damages engines. I recommend prompt professional service before small issues escalate. Don't skimp on maintenance; regular air filter changes prevent most cases.