Why Does Fuel Consumption Increase After Replacing Fuel Injectors?
2 Answers
Possible mismatch between fuel injectors and fuel pump. Vehicle Condition: In addition to regular cleaning, pay attention to the vehicle's condition, schedule maintenance at 4S shops, and perform timely repairs. Driving Habits: Poor driving habits can also lead to unnecessary fuel consumption, such as carrying excessive unnecessary weight, driving with windows open at high speeds, sudden acceleration, and hard braking, all of which can increase fuel consumption. Road Conditions: Driving in urban conditions can increase fuel consumption by 20% compared to test tracks, mainly due to frequent starts, stops at traffic lights, and gear shifts causing higher fuel consumption.
I've seen quite a few cases where fuel consumption actually increases after replacing fuel injectors. The most common reason is that the replacement injectors don't match the original specifications, especially with aftermarket parts which often have higher fuel delivery rates. I recommend first checking whether the injector seals were properly installed during replacement - leaking due to poor sealing is another frequent issue. Additionally, throttle body and fuel system cleaning should be performed simultaneously when replacing injectors. If the mechanic skipped this step, carbon buildup can clog the new injectors, resulting in poor atomization and reduced fuel efficiency. There's also a hidden issue: modern vehicles require ECU relearning after injector replacement. Otherwise, the engine computer will continue using old parameters to control fuel delivery. This week, I suggest visiting a reputable repair shop for diagnostic tool matching. Drive gently during this period, avoiding aggressive acceleration, and your fuel consumption should normalize within a week.
