History? How long have you had it?
if you're unsure of last tune up, that means you are unsure of a lot of things. I'll assume it's a recent acquisition then? If so, a top to bottom tune up, fluid/filter change is in order. Plugs, wires, air filter, oil change/filter, coolant flush, trans fluid change w/filter. Clean maf, change pvc, some injector cleaner too... That's a minus to get it going with a fresh start. Especially fo it's your only and daily driver, an investment well worth it. Then you can check compression if you're actually losing coolant, among other checks like oil to see if there's coolant in it, etc.
Good Luck!
