Hi looking for some help again, so had a bad misfire for a few weeks now, replaced spark plugs and coilpacks but still the same, unplugged the maf sensor and the misfire went away so assumed that was the issue, so brought a new one and the misfire is still there, the new maf did bring up 2 new codes though, P0113 and P0102, hope someone can give some idea as what to do next, car is a 2003 wrx. Cheers 

Was it a genuine part or copy part, I've had a few issues lately with copy parts, lambda sensors etc

Loud pipes save lives

Yeah was a genuine part, a denso sensor with the exact same part number as the old one