hello from the new guy
 

Hey everyone I rock an 89 4dr dohc zc civic.was running fine then I swapped out injectors from my zc vtec put new thermostat, intake manifold gasket, fuel filter.took for drive ran fine then popped the radiator cap to make sure everything was flowing right and hasn't idled right since. About a 500 rpm jump.goes down to 0 then jumps up then down again then levels about 750. Taking all suggestions.

Welcome to the forum 4drdohczc

Enjoy the stay!