Civic EG

iite so i changed the head gasket the intake manifold gasket and the exhaust manifold gasket. i checked for leaks and didnt really find any. im gonna buy the o-ring for the dizzy. my mufflers leaking so im not sure if i got a blown piston or not. the car continues to only idle up and down right after i rev the engine. can anyone shed some light on my problem????

ok so a muffler leak dosent mean you blew a piston you probaly eitehr have arust hole , bad exhaust manifold gasket, or bad donut gasket(the round ring in between the exhaust manifold and the cat....)

your idle could be due to a bad iacv, or a iacv that needs to be cleaned
or you need to bleed your coolant....

Sounds kind of like a loose FITV too. Check that as well.