My 98 eclipse gsx over heated and has no antifreeze but i pulled the valve cover and it smelt like burnt antifreeze. would that be a headgasket or water pump

Check your oil, if there is antifreeze in the oil then you have a bad head gasket. Otherwise (and most likely) you have a leak in the coolant system. Check your hoses, radiator, and last the water pump.
You could also get some oil in the coolant too from a bad head gasket. Check for oily residue under the radiator cap and in the thermostat. Also flush out your coolant and replace. If the coolant in the overflow turns cloudy-brownish, like a milkshake, this may be the case.

Thats a head gasket

Head gaskets are deffinatly bad.

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