Gunson Colortune Single Plug Kit Brake Service Tools when the correct tool is

when the correct tool is as cheap as chips

- Suitable for various applications including relay coil resistance/relay contacts and cyclic testing

5MM - Pegs: 7MM - Outer diameter 2: 26mm - Inner diameter 2: 19

Faces are designed to wear and can be replaced

Gunson Colortune Single Plug Kit Brake Service Tools when the correct tool isThis is effectively a glass spark plug. Colour tune has been about for years and is a very simple, yet effective tool. You replace the standard spark plug with colour tune and then start the engine. You can actually see the colour of the burn inside the combustion chamber. If the flame is very yellow then the fuel mixture is running rich. It's no substitute for a proper dyno run, but it is fabulous for diagnosis. Sadly this super useful tool has been