mercury efi failure problem?? please help suggestions needed

[Bass_Appeal]

After i cleaned the plugs it ran ruff from 2000 -3000 then ramped up fast to 5000 rpm backed down to prevent over rev......and it kinda stalled out ....so ....what ever the problem i dont think check valve because it only gives me problems between 2-3k rpm ....i was running ngk plugs bought , champions marine plugs and need to install see what happens ....i can tell u it is frustrating to say the least.......but i do think seafoam may be part of my problem ....i wanna get out and run every ounce of fuel out of it ...and go fresh ....