What would cause a misfire on cylinders 2 and 3 ?

Mate of mine changed his rocker gaskets today and when he put it all back together its running like crap and his code reader says misfire cylinder 2 and 3.

I thought 2 and 3 were on seperate banks so I was going to suggest his coilpack leads are the wrong way round (blobeye wrx) but surely it would be 1 & 3 or 2 & 4.

He's getting stressed as he need the car for work monday and ran out of light/time today. If anyone has any ideas please let us know.

 

i changed the drivers rocker (1/3) and had a misfire come up on both. changed the packs for new ones and it went away. maybe disturbing them caused the misfire - who knows? cheap enough to replace for used ones though, new ones are extortionate.

 

its the 2 and 3 that has us confused.

We also changed the fuel filter so i'm wondering if we have the pipes the wrong way round on the inlet manifold as we replaced them too so they were longer (to get under the fmic kit)

 

Cylinder 2 is passenger side front, Cylinder 3 is drivers side rear so yes, check your fuel lines to the manifold.

Mick