Slightly rough/misfire 2200rpm

[rttam]

Have a slight roughness/maybe misfire at 2200rpm rest of Rev range fine and pulls well.
Timing done correctly 3 months ago is spot on.
Had new injectors last week (genuine)
Had new genuine leads and plugs last year.
Was thinking maybe cool or lambda sensor??
Any help appreciated
Cheers

 

[Pacman.]

197, 182, 172 ?

 

[rttam]

Sorry 172

 

[Ex-User (107751)]

Had it too , especially on cold engine , it was a leak in the cat to manifold gasket.