I have this issue: If I drive my truck for a while, then make a pit-stop somewhere, say for about 20 minutes, then try to start again (when the glow plugs don't fire up), it gives me trouble. It's worse when the outside temp is 35 or up. I have installed the push-button (which works) but it really doesn't seem to be helping. It starts fine in the mornings and fine after work. Any help with this would be appreciated. My wife had to pick me up from Fred Meyer today because I couldn't get the truck to start. Talk about humbling......