Just the last few days, I have been getting a popping sound from under the hood during the first glow period. Checked it with the hood open last night and had a red glow where the glowplug busbar is attached to the metal resistor. Also, at about the point of contact, the metal resistor is burning away on one side. Here's the question: Is this the insulators that are failing (I noticed that the top one is burning away where it touches the the metal resistor when I checked the glow plugs a few weeks ago)? (All the plugs are fine. The voltage and times for the first and second cycles are good too) Thanks for any help 84 BJ60 191 km, 6v denso plugs under the stock superglow system.