I found a 2001 F350 powerstroke near me that I'm pretty interested in. I test drove it the other day and was pretty pleased with how it ran. I did some homework on the truck and went back today to go over it a little more and look at all the little things. The truck sat overnight, which got down to about 20 degrees, and this morning it was about 33 degrees when I went to look at it. It did not want to start!!!! It would turn over a little but wouldn't start. The more we tried, the more "dead" the batteries sounded. We even tried to jump start the truck from my truck and couldn't get it to go. The dealer ran a volt meter out to test the batteries and they read fully charged. The dealer called the previous owner to see what he did to start the truck on the "chillier" mornings, and the owner said he would always plug in the truck once the night temps got down to the 30's or so. But even my 6.5 diesel sits in this kind of weather unplugged and starts perfectly fine, actually, I didn't even plug my truck in all winter this year. I have talked to a few people who currently own or used to own 7.3's and they said that when it gets down to the temps we are seeing now, they would plug their trucks in otherwise they would start hard or wouldn't start. Does this sound like a glow plug issue or is this actually normal for these engines? If it is a glow plug issue I know it would be near $700 for those to be changed and all new ones put in. Any ideas?