Hello I'm Neal and I am here to help resolve your issue. If I cannot help I will opt out and refer your question to another expert.
Most likely it is going to be the fuel pump acting up randomly. The best way to confirm it would be to have a fuel pressure gauge on it when it acts up. The other possibility could be the ecm acting up, but it sounds more like the fuel pump, especially if you are not getting a check engine light or any codes.
1) What is an EMC?
2) Are either hard to replace?
I wouldn't say I am a novice but I certainly lack experience on mechanics. Is it something I could do if I got the tools and manuals ( and beer )?