... then i found out why i got tired real fast. we had the truck running in the shop with one door open but it wasnt enough cause a camper in another bay has its carbon dioxide detector start alarming. silly rednecks
Rednecks aren't the only ones to this my friend! The construction company I worked at for 23 years had NO ventilation in the shop during the winter when we did most of the heavy truck maintenance. The shop was a two stall concrete pre-cast building big enough to put two semi's in. Get two semi's running at the same time in shop and see how fast it fills up with a lack of oxygen.

Or rig up a paint booth and paint a bulldozer in there. I've had my head so full of noxious fumes so often I'm surprised I'm still alive. Headaches were a normal occurrence when working in the shop, took a handful of aspirin and we did what we had to. I've sandblasted so much with a 200lb pressure pot sandblaster with just a canvass blasting hood, using Black Diamond, silica, and playground sand. Many semi trailers, dozens of pieces of crane boom, crane cabs, all sorts of parts, concrete surfaces of swimming pools, and the list goes on.
I know I shouldn't but I get a kick out of folks that wear plastic gloves to use carb cleaner...