Idle fast then slow

I have a 92 Accord Wagon with about 137K miles. The problem i have is when i start the car it idles like it should around 2K then after it warms up it idles around 1100 and up to 2000 then back and forth till i shift the car into R or D4. I have checked the ECU and the code it flashed was 14 which is the EACV so, I unplug the EACV and it idles around 1000 which it says to then adjust the Idle adjust which i did but nothing. Also reset the ECU and plugged back in the Electronic Air Control Valve and the idle jumps up and down still. I think I need to replace the valve but want for help with this before i go out and call Honda for a new valve????? Also it has a AT and i have already replaced the following parts, Water pump and all belts and air filter if it helps. Any help would be GREAT!!! Thanks

Nightwalker