Iac is brand New replaced it less than 300 miles ago ,
A vacuum leak is easy to find put a hose onto the capped port on the firewall tree light a cigar and start blowing smoke in. Eventually you'll see smoke come out the air filter hopefully somewhere else before that, if there is a vacuum leak.
LOL WUT
Vacuum leaks don't leak air OUT of the system, they leak it IN.
:facepalm:
I thought he meant with the engine running
The firewall tree is attached to the intake so the smoke goes through the whole intake. It does work better if you block the throttle body with duct tape.
I think he means with the motor off, blow smoke in through vacuum tree through a hose. That would work great if that were the only place you could get a vac leak at.
(I sure hope MFE sees this before he heads out the car running in the garage with a cigar and garden hose)