warmed the car up and shut if off...waited 10 min then took plugs out. gassed it and cranked it 4 or 5 times. setup is a b16 head on gsr block with jdm itr pistons. got 240, 210, 240, 235. i dunno what's up with #3. what could be the problem? worn piston ring?

 

those are fairly good numbers. If the rings were bad they would be alot lower. IMO

 

do a leak down that way you can see where you losing pressure it could be just some carbon on the valves... good luck tom