What are the effects of fuel injector leakage?
2 Answers
Introduction to the effects of fuel injector leakage: 1. Slight dripping: In terms of power and fuel consumption, there is basically no noticeable abnormality unless a professional 5-gas exhaust analyzer is used to detect the exhaust content. 2. Moderate dripping: When the fuel system pressure reaches the standard idle state pressure, intermittent dripping occurs. Even if wiped clean, liquid seeps out again. When starting the engine in a cold state, the engine has difficulty starting, requiring 3 to 4 attempts to succeed, and the accelerator pedal must be pressed, otherwise the engine will stall. After stopping the hot engine for a while, restarting is also difficult, requiring the accelerator pedal to be pressed first before starting. Fuel consumption increases slightly but not noticeably. 3. Severe dripping: The fuel injector cannot close normally, starting is extremely difficult, fuel consumption increases sharply, black exhaust gases are emitted, the engine shakes severely, and normal acceleration and driving are impossible.
I know all too well about fuel injector leaks. Last year, my car fell victim to this issue. The most obvious symptom was the sudden spike in fuel consumption - where a full tank used to last 500 km, it dropped to just over 400 km after the leak. The car also felt noticeably underpowered, especially when climbing hills where flooring the accelerator barely increased speed. The mechanic explained that leaks cause improper fuel injection - either too little or too much gasoline entering the cylinders, leading to incomplete combustion and increased carbon buildup. Over time, even the engine sound became muffled. The scariest moment was when I parked and smelled strong gasoline, only to discover fuel dripping from the chassis. Had it contacted hot exhaust components, it could have ignited. I immediately spent over 1,000 yuan replacing the entire fuel injector assembly - still gives me chills thinking about it.
