i just bought a 94 integra and when it sits idle the engine revs a little (bout 1k-2k rpm) over and over and i think its just one of the sensors are bad, anybody know which sensor that would be?

 

check the iac idle air control valve...lots of posts about how to do this

 

the engine is a b18b1 does that matter?

 

no it doesnt. i also would check for a vacuum leak

 

definetly sounds like a vacuum leak

if you take a can of carb cleaner, spray a little slowly around all the vacuum lines, if you hear the engine change, the carb cleaner is getting sucked in the vacuum leak and evening out the mixture, and there you have your leak.

you may also wanna clean off your iac.