well i have a surging idle problem on my 90 integra... the IACV is brand new .. but when i unplug the map sensor the surging idle stops.. i replaced the map sensor.. and when i pluged it in it did the same thing... bascicly im looking to what it could.. next im gonna check for vacuum leaks.. but besides that what else can affect the idle.. the surging is up and down up to 2krpm and back down constantly..let just say there is no vacuum leak.. what other sensors should i look at?