What is the solution for flooded spark plugs in fuel-injected vehicles?

[DeCameron]

The solution for flooded spark plugs in fuel-injected vehicles is: 1. Dry the spark plugs by heating them; 2. Check if the engine's intake system is leaking or blocked. The working principle of spark plugs is: Under the control of the engine, they introduce the high-voltage electricity generated by the ignition coil into the engine cylinder, creating a spark between the spark plug electrode gaps to ignite the air-fuel mixture, ensuring the engine runs smoothly. The method for removing spark plugs: 1. Clean any dust or debris around the spark plugs using compressed air or a soft tube to blow it away; 2. Ensure the engine is in a cold state before proceeding; 3. Immediately protect the spark plug hole after removal to prevent any debris or dust from entering the cylinder; 4. Avoid damaging the insulating ceramic body when using a wrench; 5. When adjusting the spark plug gap, do not bend or strike the center electrode.

[DiHenry]

That day I encountered a flooded spark plug in an EFI (Electronic Fuel Injection) car. First, I opened the engine compartment, removed the spark plug, and wiped off the gasoline stains with a clean cloth. Then, I let it air-dry for a few minutes to ensure it was completely dry. Next, I pressed the accelerator pedal all the way down without releasing it, turned the key to start the engine, allowing a large amount of air to blow away the accumulated fuel in the cylinders. After trying for a few seconds continuously, the engine started. If this problem keeps recurring, it's necessary to check whether the fuel injector is leaking or the mass airflow sensor is faulty; otherwise, the spark plug might get flooded again next time. After handling the issue, it's best to let the engine run for about ten minutes to ensure all the gasoline evaporates completely. Remember not to keep cranking the engine, as that will only make the spark plug flooding worse.

[DeLiam]

Last time my car's spark plugs got flooded, the engine sputtered when starting. I directly removed the spark plugs to dry them, and took the opportunity to check if the ignition coils were leaking electricity. When starting, I pressed the accelerator to enter wide-open throttle mode - this trick works particularly well because it increases airflow velocity. If the flooding is severe, you can also pull the fuel injector fuse to cut power, then plug it back in to reset the computer. This kind of problem often occurs in cold weather when excess fuel isn't burned off. If it still doesn't work after these steps, there's an 80% chance it's caused by an aging oxygen sensor disrupting the air-fuel ratio, and you'll need to visit a shop to read the trouble codes. Remember to apply insulating grease when changing spark plugs to prevent short circuits.

[StevenRose]

A flooded spark plug is really troublesome. When I deal with it myself, there are just two steps: remove the spark plug and clean it, then start the engine with the throttle fully pressed. For fuel-injected cars, you can stop the fuel injection by disconnecting the fuel pump relay or pulling the fuel pump fuse, then crank the engine several times to expel the fuel. After reinstalling the spark plug, just give it a gentle start. The key is to check the cause—for example, a faulty coolant temperature sensor can make the ECU misinterpret it as a cold start and inject too much fuel. Carbon buildup on the spark plug can also weaken ignition and lead to flooding. Using a multimeter to check cylinder compression can also rule out valve issues. Remember, after cleaning, rev the engine high and drive a few kilometers to thoroughly dry it out.

[DiEloise]

My experience is, don't panic if the spark plugs get flooded. Take them out, spray with carburetor cleaner, and let them dry. When starting, press the accelerator pedal all the way down to fully open the throttle, allowing the increased air intake to disperse the gasoline. If it doesn't work the first time, wait half a minute before trying again to give the battery a break. For fuel-injected cars, be especially careful not to tamper with the electrical circuits randomly, as it might trigger more troublesome fault codes. For prevention, change the spark plugs every 20,000 kilometers and clean the throttle body carbon deposits regularly. If you notice difficulty starting, stop immediately and avoid continuous cranking, or the repair cost could exceed the price of new spark plugs. Revving the engine a few times before parking can also prevent oil accumulation in a cold engine.

[LeCamille]

I've encountered flooded spark plugs several times, and the key is to handle it methodically. First, remove the spark plugs for cleaning and drying; replace them if the electrodes are blackened. When starting, press the accelerator to enter 'cylinder cleaning mode,' where the engine doesn't ignite but only expels oil. Pay special attention to the fuel pressure regulator in the fuel injection system—its malfunction can cause excessive fuel spraying. Additionally, a clogged fuel evaporation tube can also trigger issues. Personally, I also check the ignition coil gap—if it's too large, poor ignition may lead to increasing fuel accumulation. After handling, remember to drive at high speed for a while to evaporate any accumulated water in the exhaust pipe. For prevention, avoid overfilling the tank, as low-quality gasoline with impurities can easily clog the fuel injectors.