xBROKEx

iTrader: (7)

so i had my car tuned and its idles and drives great, except when you turn the A/C on, Then the idle jumps to 3k. But as soon as i turn it off, the idle goes back to normal. Any idea what could cause this?

Frost

iTrader: (45)

sure, but posting here will get you an answer regarding what to fix. That'll be hard though since you aren't tuning your own car. Why not call your tuner and let him know what it is doing?

V8_Club

iTrader: (2)

Posting a copy of your tune helps. Maybe he has the AC ON Column ( In the Target Idle Speed ) Table set too high.

Wicked 1

iTrader: (30)

do you ls1edit or hpt post your tune if you can

jimmyblue

iTrader: (11)

This is coming from the A/C drag torque calculated
which drives an airflow adder. Apparently the excess
air is way more than you need. Possibly because the
idle has been "fixed" before by some shade-tree
method, possibly because your motor torque:airflow
relation is whacked from mods and/or metering error.
Getting some degree of A/C "cruise control effect"
is not uncommon. In my experience, which is only
a few vehicles, the A/C torque model is not the
problem but low-end torque -> airflow is easy to
get messed up. Especially if the motor has a bogus
airflow situation.

edcmat-l1

iTrader: (10)

I'm with JB on this one. Probably a cumulative effect. Blade is too far open, IAC is likely at zero counts, AC tq may be cranked up, along with a negative idle trim. Once you turn on the AC, and it adds the AC air to the airflow total, and zeros the trim, and yada yada. You get a 3000 rpm idle.
It most likely will need a do-over. Idle speed would need to be set, blade positioned, drilled to get the IAC counts right with AC off, idle trims close to zero, then dial in the AC airflow adder/AC tq.