Q: How to check and replace spark plug wires on Ford Escape?
A: You should often check your Spark Plug wires. When the engine is running and you are in a dark place, look at the wires. Check for arcing or blue sparks that show damage. Disconnect one wire at a time and remove it from the spark plug as well as Ignition Coil terminal, checking for corrosion to ensure that it fits tightly on both terminals. Wipe them clean then examine if there are any signs of damage to them too. They will need replacement if found bad, make sure they are installed properly.