On 5/26. The Honda car was overheated, low idling, and hard to start.
On 5/27. Checked and notice: oil low, coolant low. Bought coolant, carburetor cleaner. Filled up oil, filled up coolant, top off the brake fluid, power steering fluid, and windshield washing fluid. Also replaced the air filter. Removed the air handler, cleaned the throttle, and tried to adjust the idle screw, but nothing changed. Unplugged the IAC, nothing.
On 5/28: Bought hand-held code reader, and the code points to the IAC. Opened the throttle and cleaned again. Reset the code, but it came back after idling for about 15sec. Brought to Japanese Auto Services on Lee Hwy.
On 5/29: Service shop wants $600 to replace EGR valve. Refused. Paid $88 for diagnostic charge. That same afternoon, took the car home. Removed the EGR valve, cleaned with carburetor cleaner and it's work again. However the CEL for the VTEC valve is triggered. Bought the EGR gasket, but have not put in, probably 6/2.

On 6/2 we took the EGR out, clean and replaced with new gasket. Also with the VTEC valve, we took it out, removed the gasket, cleaned & replaced with a new gasket. The VTEC old gasket has a screen, and it clogged with debris. The three 10mm bolts was a bit tough to remove, we have to take off radiator hose (to the heater) and also the wiring bracket to gain access. Also, use the close-end wrench instead of sockets. Also, removed the pressure switch sensor to gain access. As you can see, the gasket has the screen filter, and when that screen get clogged, the amount of oil delivered to the valves will be less. We could not buy the solenoid rubber seal, thus we will try to order it from the internet and change it later.