idle and start up
 

i have a 96 civic with a ls-v swap and it has a hard time starting and the idle sits at like 1500 when it get warm i have tried cleaning the IAC messing with the idle screw and i am just out of ideas so if anybody knows anything please help

Any vacuum or intake air leaks?

Is the FITV clean and adjusted?

Is the throttle cable adjusted too tightly?

what is the FITV

The test to check for air flow through the side holes is important. Once warmed up, the FITV one should be completely shut off, and you should be able to stall out the engine by blocking the IACV / air screw one. Excessive air getting into the intake manifold by any undesired path will increase the idle speed. Check also for missing vacuum hoses or a leak in the brake booster.