Drop in MPG & Selespeed jerky in 1st
My 147 Sele's MPG has dropped from around 29-30 to 23-24, or 340 miles per tank full vs 270 per tank. Also it's become jerky pulling away, particularly when performing hill starts (not fun driving around Bristol). The two problem started around the same time I think, so I'm assuming they are linked at the moment.
I've checked the air inlet tube, all the joints are tight and I can't see any splits in the flexi bits. So from reading other threads I'm thinking MAF as that can apparently upset the selespeed too, or lambda and the sele is a different issue? I've got fiatecu scan, so before I start replacing sensors willy nilly what values should I be looking at to identify the problem?
Anything else I need to look at?