Quote Originally Posted by 1SOL2NV
its a vacumm sensor .. ... jus screw it to the back of the manifold and clip the sensor in .... i think its a IAT sensor ... could be wrong but i know i had a bunch of these break on me . on a OBD1 car these jus have a philips screw and is screwed to the back of the manifold and runs to the charcoal canister via a vacuum (sp) line .

im not 100% on its name or function. id say out of the last 100 honda and acuras with them ive worked on about 80% was broke.