Where is the negative terminal of the Citroen C4L battery?

[DeEthan]

The replacement cycle for the Ford Kuga spark plugs is 45,000 KM or 30 months. Spark plugs are part of the ignition system, and their main function is to introduce the high-voltage electricity from the ignition coil into the engine cylinder, generating a spark between the spark plug electrode gaps to ignite the air-fuel mixture, thereby enabling the engine to perform work. Below is more information about the spark plug replacement cycle: 1. The replacement cycle of spark plugs is directly related to their material. Nickel alloy spark plugs should be replaced every 20,000-30,000 kilometers, nickel-yttrium alloy spark plugs every 30,000 kilometers, single platinum spark plugs every 40,000 kilometers, double platinum spark plugs every 60,000 kilometers, iridium spark plugs every 80,000 kilometers, and platinum-iridium alloy spark plugs can last up to 100,000 kilometers. 2. To determine whether spark plugs need replacement, they should be removed and inspected, observing their color and the gap between the electrodes, as well as checking for any air leakage between the ceramic and the metal casing. If removing them is inconvenient, you can also observe whether your car has difficulty starting when cold, whether the idle speed is shaky, or whether there is a noticeable decline in engine performance. If these symptoms occur, it is likely that the spark plugs have reached the end of their service life.