Civic EG

okay here's my set up eg hatch with f22a6 I start my car and start so far couple seconds later if I would hear something open up inside of my manifold the idle will jump up to about 3000 rpm and drop back down but doesn't do it consistently just when it feels like it I will go up n down a few times mm stop in and do it again whenever it wants I checked for vacuum leaks I don't have any check engine light codes I've cleaned the idle air control valve I switched on my map sensor I've changed my injectors spark plugs spark plug wires had my ecu chipped....can it be possibly be a do ground issue because I am missing 1 ground wire

Fast idle valve try cleaning it, idle air Valve control clean that as well. Ita definitely a vacuum leak. If all else fails replace the intake manifold gasket, and the throttle body gasket

On a another forum someone said its my coolant system has air

That possability is so remote its not
Even realisitic. The things i metioned are the most comon fixes for bouncing idle. Bleeding your coolant system is easy though. Try them all