Yesterday on the way home I smelled coolant burning, it seemed to be originating from around the thermostat housing somewhere. It seems to be spraying onto the hood and across the engine bay. I could not visibly see a leak or any kind of spray going on. Today I replaced the thermostat and o-ring since I had it handy, buttoned her back up and went for a spin. Got back home and still the same thing. I can not visibly see any place leaking, but it is coming from somewhere. I tried to rev the engine a bit to see if I could see where it's coming from but I can't find anything. It seems to only leak under hard acceleration. Any ideas? Is this the intake manifold possibly? It's a 98 NPI engine.