1998 Honda Accord 2.3l vtec 5sp trans so my car idle is surging?

so my car idle is surging. When I start the car it will idle around 2k for a couple min. Then it will go into a surge. It will idle between 1 and 2k. I have noticed if I rev the car over 5k (quick rev) the surge will go away and idle perfect. It will hold a perfect idle until I start driving again.

I have replace the following.

Iac valve
Tps
Map sensor
Throttle body
Coolant temp sensor
No vacuum leaks

I have burped out the cooling system to many time to count. I have also pulled the number 13 fuse and tried a idle relearn. I'm running out of ideas here. Is it the pcm? Are there any other test to do? It's driving me crazy.

Thank you for your time.
Josh

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