1998 mercury 200 efi missing at medium RPM's

[Pking]

Mercury missing at medium RPM's between 2000 and 4000, runs fine at lower and at full throttle. Also starts easily, any suggestions? Thanks in advance

 

[Faztbullet]

Re: 1998 mercury 200 efi missing at medium RPM's

What type of plugs you running? Whats your fuel pressure at these rpms?