This is after a 25 minute drive home, and I left the car idling for several minutes. It started surging again, and it's the first time doing this again. Before it would hang at 1k until it throws a code, but it's not even throwing a code.
https://drive.google.com/open?id=0B1...mxhd1lJQ2FJNkU
This is after a few minutes of cooling off and restarting. Idle surge isn't as bad. If I let it cool down longer, idle will be more stable and lower.
https://drive.google.com/open?id=0B1...WtGSnBrWHg4NVU
Here's the video:
https://drive.google.com/open?id=0B1...2E2MUFCc0tjNFk
It seems like idle surge is pretty bad when things heat up to the point the cooling fans kick in. If I let it cool down it starts idling just fine without the crazy surge. I also sprayed underneath the intake plenum, and it did not have any effect. Before the engine would hesitate. Idle tends to climb up to 1k and dropping a few seconds after starting the car. It has been doing this since I finished the maintenance work last year.
The one thing I've not done since changing out the oil catch cans is to reset the ECU (fuel trim) and whatnot. While idling in the garage it smells like raw fuel. Things seem to have improved over a week ago after installing the new catch cans, but now it's getting worse again.