We have had a pretty good cold snap here in CT. My 6.5 Suburban has not been happy. But the old M1008 started every day, although it took some cranking. So I used a meter to test resistance on my glow plugs in the truck. Put one lead on the spade, one on the block. I found four that showed as open, and one that showed 07.2 on the 200k setting. At that point I stopped testing and went and bought AC 60G plugs. I was prepared for the worst, but the first one came out really easily.....like it was not tightened fully. This was true for all of them. They all came out easy. I was telling the truck what a good truck it was (Instead of cursing like some vehicles get me to do). Put the new plugs in, and it starts like a champ.
I decided to check all the plugs I took out, inside the house where it was warm. That turned out to be a surprise.
The truck had six AC 13G plugs in it. Four of them showed 0 ohms.
One showed 07.2 and had a small hole burned in the side of the element.
There were two Wellman 6A843G070 plugs in it, both with 0 ohms reading.
So, it seems like only two were bad? Why were my readings different in the truck? I am guessing it is because the plugs were somewhat loose, and not making a good ground?
I decided to check all the plugs I took out, inside the house where it was warm. That turned out to be a surprise.
The truck had six AC 13G plugs in it. Four of them showed 0 ohms.
One showed 07.2 and had a small hole burned in the side of the element.
There were two Wellman 6A843G070 plugs in it, both with 0 ohms reading.
So, it seems like only two were bad? Why were my readings different in the truck? I am guessing it is because the plugs were somewhat loose, and not making a good ground?
