Originally Posted by
Madrugador
Now the engine fires up and everything should be great, but what happens afterwards is that the glow plug light comes on and off intermittently with a series of clicks from the controller showing that the system is doing something.
I'm assuming this stops after a few seconds once the engine is running? If so, this is normal operation and is called "after glow." It's to help the engine smooth out after it is running but still cold. Even on my electronic 6.5L diesel, it will cycle the plugs 2 to 3 times (depending on ambient temperature) for a second or two each time after the engine has started.
If the plugs continue to cycle without stopping, then there is an issue with the glow plug controller.
Casey
1995 K1500 Tahoe 2 door, 6.5LTD, 4L80E, NP241, 3.42's, 285/75R16 BFG K02's; 1997 506 block; Kennedy OPS harness, gauges, Quick Heat plugs, and TD-Max chip; Dtech FSD on FSD Cooler; vacuum pump deleted, HX35 turbo, Turbo Master, 3.5" Kennedy exhaust, F code intake; dual t/stats, HO water pump, Champion radiator; Racor fuel filter