so my b13 started idling funny about 2 weeks ago and now its really acting weird it went from going up to 2 grand and now when your driving after a while you turn on the a/c and the idle goes up to 2 grand and then goes up and down ,up and down but if you turn off the a/c it goes back to 2 grand or jumps back to 1 so what could it be?:confused::confused::confused:

It could be any number of things. I would start by cleaning the throttle body. Look for vacuum leaks in your intake. Then check throttle position sensor voltage. Then check your MAF ground. Then set base idle speed and timing. If the problem persists, after doing these things, then you might need to clean or replace your idle air adjustment valve.

There are instructions on how to do all these things posting in this forum -- you just have to search for them.

Please report back on your progress.

thank you and will do.