Hawk350

Pieced my car together friiday. I removed the intake and re-sealed it due to a leak in the back. Now the car runs much better. Today driving, I got a spudder where it felt like for a .10 of a sec the car misfired, or is felt like a loss of spare or whatever. Would a MSD Ignition system help this or what could cause this to happen and how can I diagnose this? I pulled into the gas station to get soem fuel and I noticed the "check engine light came on for 20 seconds and then went off. Last time this happened, my friend scanned it and no codes, I am getting a bit frustrated with this. Everthing else it ok.