2000 Amigo 3.2 Hard Start @ Check Engine Light

My 2000 Amigo with 60K miles started acting up. It is very hard to start, and idles rough when it does. It also has a steady Check Engine Light. Following all the fine suggestions already posted, I
went to Autozone and had them hook up the analyzer. I had the following fault codes:
P0402 EGR flow excessive P1404 ?, I could not find this code in the manual P0300 Random multiple cylinder misfire
Does anybody have an idea as to what could cause all these codes? Should I just replace the EGR valve?
I did replace the spark plugs for the cylinder misfire, but it resulted in no change to the way the vehicle starts, and runs.
Any help would be appreciated Thanks Greg
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