The GP light has been acting up lately. When I turn the key to the 'run' position for the pre-glow, the light does not come on, so I figure there are bad plugs. I'll try to glow again with the same result. Then, if I try to start it, it starts up, but runs roughly for a minute. It is the classic case of bad glow plugs. But it gets interesting. The light will come on if I crank the engine once with the starter (but not start the engine), then turn the key to the 'run' position again. After a few seconds it goes off and the car will start right up. Other times the light will come on the first time I turn the key to the 'run' position and the car will start up. All the GPs have .4 Ohms resistance, the battery is fine, and the fuse on the relay is OK.
Why are the plugs glowing randomly? Works sometimes, not others.
