Just received 98 civic EX. Car has been sitting for a minute,(a year plus)Car was running but "missing" when parked. I pulled all the plugs and 3 looked pretty good, the fourth one looks brand new. Almost like the plug had never even fired. Oil is clean-no coolant, coolant is clean and green, it does not smell like exhaust. Any guesses?

 

More info please...does it have spark or fuel, what about compression

 

Coolant is leaking into the combustion chamber and steam cleaning it. Pull the head and inspect, hopefully it's just the head gasket.

 

Id probably do a leakdown and that jazz before i pulled the head.