Update- truck has been running with 16 lb. rad. cap (I have a feeling this ain't proper...). Checked the plugs, all look normal, no sign of steam/ water. I'm running the truck right now with the cap off just to see what happens. So far, it's been idling for about 1/2 hour with no problems. So, should I go to a no-pressure cap? What's going on with the 16 lb. cap? Seems like we're close to solving this- thanks guys.
Tyler
