Driving last night, picked up a small leak on a radiator hose, this morning on a cold start, it idles to 2100 drops and back up again. Any words of wisdom?

 

Fix your leak. Fill her up. On an incline.

The IACV and FITV both require coolant to function properly. IACV is at the highest point in the engine cooling system while the car is on level ground, and the FITV is up there near it. Therefore, low coolant (or a leak) will produce a fluctuating engine speed at idle.

A quick search of any honda related forums or your search engine of choice should've found you a similar answer.

Tip: if your leaky hose is on the back of the intake manifold, replace all those 20 year old hoses while you're back there. Hunting down small hose leaks back there for several consecutive years isn't fun. Advice from personal experience.