truck crazy man

Ok my 1995 Ford is running like a lame mule. When going uphill it seems to be cutting in and out on the cylinders. very low power. the check engine light came on so I pulled the codes out. The results are as follows:

111: System Pass
211: HO2S System Indicates Rich
225: Knock NOT sensed during dynamic response test
332: Insufficient EGR Flow Detected

I'm not sure if my truck has the solenoid or not. Can anyone tell me if it has one and help me understand these codes so I can figure out what parts to get. Thanks