i have a 93 prelude with a jdm h22a motor swap conversion but i still have not figured out how to get the car to idle a 750 rpms as i should i have checked for vacuum leaks and exhaust leaks. hears the catch though if you unplug the sensor directly behind the intake manifold and the temp sensor directly underneath the distributor the car will idle but at 1750 rpms. if anyone has any advise i would greatly appreciate it.

 

Check the cap and rotor

 

check your trottle cable (sometimes it gets stuck)
adjust your trottle screw (on the tb)
does your idle stay at 1750? or jump?

 

You just have to check every vacume line. it took me about 2 1/2 months to find my leak... if not, try the idle screw on the TB. good luck!