Mechanic Q: 2003 toyota camry coolant problems?

my camry makes a bubbling sound when i am driving it. my resivoir is always empty and i always have to refill it. it doesnt over heat nor does the needle rise to hot. is it a radiator issue.

Mechanic Q: 2005 dodge neon?

would stutter when i pressed gas so i replaced the map sensor, now it doesn't want to stay started the engine will turn over but, won't stay started