Why should you grasp the boot of the spark plug wire and not the cable itself when removing the wire?
The actual method of removing the old wire is not always “just pull it off.” Pulling on the wire itself is sure to cause an internal separation. Of course, if you’re replacing a bad wire, it may not matter, but if any one of the old wires is still good, it’s best to keep it as a spare.
What is the boot of a spark plug?
An ignition boot is also called a coil boot or a spark plug boot, and a lot of vehicles now have one ignition coil, which creates voltage, that mounts on top of each spark plug. The “boot” is what connects the ignition coil to the spark plug. It is similar to a spark plug wire but isn’t visible.
Why does my spark plug wire keep popping off?
Another thing you can do is poke a small hole in the rubber cover of the plug wire , as the engine heats up the air trapped in the plug boot heats up and expands and can cause a loose fitting plug wire to pop off while riding .
What causes a spark plug to blow out?
A loose spark plug, especially one that is held in above with an ignition coil can vibrate and damage aluminum threads. It actually would do less damage if it were allowed to back on out without being held by the coil. So a loose spark plug is the most common cause of a spark plug blowout.
What are the symptoms of bad spark plug wires?
This is necessary due to the aging of the spark plug wires from exposure to extreme temperatures (hot and cold), engine chemicals (oil, grease, coolant, etc.) and electrical stresses. Common signs of failing spark plug wires include a decrease in power, acceleration, and fuel efficiency.
Why do I need to replace my spark plug wire?
The following situations call for immediate replacement of spark plug wires: Vibration damage – Constant wear and tear caused by engine vibration can loosen the electrical connection at the spark plug. This causes an increase in the voltage required to fire the spark plug, which could damage the ignition coil as well as the spark plug wires.
Are there threads in the spark plug hole?
This is a known problem with this engine and Ford/Mercury has a technical bulletin for installing an insert into the spark plug hole. You may not think that you don’t have a loss of threads in the hole, but you do. The heads only have about 4 threads for the spark plug hole.