I have a problem with my RPM's rising and droping when im sitting in neutral and when I turn on the AC it stays at 3 RPM's I've been told that it could be a number of thing like one of my vacuum lines are disconnected
and i checked that and it isn't. I was also told that my map sensor is messed up or that my spark pluges are miss fireing. so what do u think it is?

 

At idle, hrmm possibly fuel filter is clogged?

-soapscum

 

my guess:
maf sensor. its the lil wire (that runs to a black box) connected to the airbox. my car (5spd) sitting out of gear has that problem sometimes, revs going from ~1200 to 400 and just waving around. it does it severly enough to stall the car jsut sitting there. my wire is obviously getting a bad connection and i can see that. yours my be the connection or the sensor itself. as far as a/c problem, i know it raises revs but not that much, and i dunno if its linked to the maf because i have no a/c

 

Your car doesn't have a MAP sensor.

Check for vacuum leaks, etc......