Choppin

I got a 1997 civic HX and when im completely stopped my car goes up and down on RPM's...What can be causing it to do that?

hondafreak95

Try searching on the site, its a common problem. Many people get ticked off when users dont try searching. Im sure you will find your answer pretty quickly with a good search.

Choppin

yeahh i think its the IACV (idle air control valve)..but people also say it could be a vacuum leak.

hondafreak95

Yeah your on the right track bro, try looking at all of your vacuum lines an see if there are any leaks, if not try cleaning the IACV. Also have you replaced your intake or intake manifold? Could be a hole that isnt covered.

Choppin

nope the cars completely stock...i think ima just go through the vacuum lines nd check to see if theres a leak, if ithe the sensordo you know of any places to get a IACV sensor cheap cause i looked online nd their expensive as hell

hondafreak95

Yeah go ahead an check those lines and you dont have to buy the sensor yet, theres a few DIY online where they show you how to clean it. Try that first an then go from there. So much easier on your pockets.

Choppin

yea thats truee im just try those things nd if worst comes to worst then ill just have to buy the sensor