from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Alternative spelling of glow plug.
Sorry, no etymologies found.
The cold start glowplug system is not working properly, so fuel in one or more of the chambers is not combusting until the engine gets hot.
So I typed it in to the search box on their web page and found that I had a fault in my #2 cylinder glowplug.
It is normal for the glowplug light to flash and for the engine sound to change slightly while using this function.