I think you misread my post, I said hundereds of dollars worth of electronics, like my neighbor's ECM overheated and fried, he melted his spark plug wires, and I think he mentioned a couple other sensors went bad due to being too hot for too long. High heat creates high resistance in electronics and they tend to burn up. I'm not saying it will happen, but I've seen it happen to a truck just like mine in the same climate as mine so thats good enough for me.

EGR stands for Exhaust Gas Recirculation. The way I understand it is it takes exhaust gasses with unburned fuel and purges it back into the engine to reburn and reduce emissions. It's technically illegal to mess with just like any other emissions system, but I live in a state that doesn't test emissions on OBDI or older during inspection.

If you want to know if you have an EGR valve, look at the very passenger side of the back of the intake manifold close to the oil pressure sending unit and see if there is a valve with a hose going to the passenger side exhaust manifold (or header if you replaced the manifold).

 

you dont have egr or "stock headers"