Hi, I put together some old parts into a running engine and tried using one of the old (but didn't look old) glowplugs that had come in the box of parts. The engine ran fine with the ignitor hooked up but died abruptly when disconnected. I know there are reasons why the element will no longer maintain the catalytic reaction, but to be honest this is the first time I have encountered this personally with a seemingly good plug. Besides metal particles ruining the element what else could have caused this to happen? Some type of solvent or penetrating oil?
Thanks, Tim