i have a 95 honda civic and just dropped in a b16a and a new ecu and after i got it running i noticed that it idels between 2000 and 3000 rpm and was popping up a map sensor code and there is no map sensor on my car so i wired one in and tied into the pcv vacum line for vacum the car runs ten times better and doesnt suck so much gas but it still has a very high idle and still popping up the check engine light since i have not been able to hook up the com to check the code yet any body have any clue what is going on with it

 

Check your codes, resolve the codes per the instructed procedures in the factory helms manual

 

what mtber said & also clean your IACV (Intake Air Control Valve)