I just got done with my ls swap in my 95 civic dx coupe and it has a idle issue. first i replaced the IACV and nothing then i bypassed the FITV and it has stopped idling weird when its fully cold but it will surge from 1 to 2.5 when its halfway warmed up. i dont know what to do anymore any help will be appreciated. thanks

 

did you bleed the coolant..?

 

i did when i put the motor in. Why would that make the idle surge like that?

 

That sometimes happens when there is air bubbles in the system.