’93 missfire at 3000rpm

Hi, '93 w 351. missfires real bad at 3k rpm. I shut down engine, and restart, all is fine, runs like a top until it hits 3k rpm. Friend said it was the Ignition...but i dont remember what this piece it called...i believe its the flat disk - thats where the distributer cap is normally...he said the "computer" is whacked out...turning off the engine resets the computer...nothing to fix just replace it for about $200...i think its called a power pak. Anyone have any input? or know what im talking about and can clarify it for me? thx

I thought I had a ProTech problem. I ended up putting in a new fuel line with inline filter, changed my plugs, even had my carb rebuilt and it all cleared up. My would start to backfire around 3k. so far it has not started up again. You could be having fuel problems. Check for any leaks in the line between the water seperater and the carb. That metal fuel line with the flair nuts goes to crap. Could be sucking in air with the fuel. The boat starves or gets the wrong mix when it hits 3k and suffers.

I think if you had ignition problems with protech, it would be all over the range, not just at 3k. But again, check the forums and see what the consensus is. I was 100 percent sold it was my protech, but it was fuel issues