1. Use an OBD-II scanner. OBD-II (On-Board Diagnostics II) is a system that allows you to read diagnostic trouble codes (DTCs) from your car's engine control unit (ECU). Most modern vehicles have an OBD-II port, which is usually located under the dashboard. You can purchase an OBD-II scanner from an auto parts store or online. Once you have a scanner, you can plug it into the OBD-II port and read the DTCs. This will give you a better idea of what is causing the gas-burning issue.
2. Check the fuel pressure. The fuel pressure should be between 40 and 60 psi. If the fuel pressure is too low, it can cause the engine to run lean and burn more gas.
3. Check the ignition timing. The ignition timing should be set to the manufacturer's specifications. If the ignition timing is off, it can cause the engine to run hot and burn more gas.
4. Replace the oxygen sensor. The oxygen sensor measures the amount of oxygen in the exhaust gas. If the oxygen sensor is faulty, it can cause the engine to run rich and burn more gas.
5. Replace the spark plugs. Worn-out spark plugs can cause the engine to misfire and burn more gas.
6. Clean the throttle body. A dirty throttle body can restrict airflow and cause the engine to run rich and burn more gas.
If you are not comfortable performing these tasks yourself, you can take your car to a qualified mechanic.
