Are spark plug wires supposed to be hot?
No, there’s no way the battery or any other wiring fault will cause the plug wires to get hot; they’re not actually connected to anything at either end – there are air gaps at the plugs & in the distributor cap.
What spark plug is hotter 8 or 9?
Champion plugs are hotter the higher the number, colder the lower the number. Starting with part # RCJ7Y (heat range 7), a colder plug would be # RCJ6Y (heat range 6), a hotter plug would be # RCJ8Y (heat range 8).
Do I need a hotter or colder spark plug?
For NGK, Denso and Pulstar, the higher the number, the colder the plug. … When making spark plug heat range changes, it is better to err on the side of too cold a plug. Running too cold a plug can only cause it to foul out, whereas running too hot a plug can cause severe engine damage.
Will a hotter spark plug stop fouling?
Rich air/fuel ratios require a hotter plug to prevent fouling. Mixtures that cause the plugs to read lean may contribute to pre-ignition or detonation. … The higher the compression ratio, the colder the spark plug needs to be.
What is a hotter plug?
A hot-type spark plug has a longer insulator nose. The insulator nose of a hotter spark plug has a longer distance between the firing tip of the insulator and the point where insulator meets the metal shell.