Had a good look for vacuum leaks. I found a crack in the pipe between the rocker cover and the intake tube. replaced. No change though, I guess it's on the wrong side of the butterfly so there's bugger all vac on that pipe and i doubt it would be moving enough air to throw the mixture out. MAF setups are shit, MAP based all the way. If i was serious about keeping the car i would probably but a MS ecu on it and make it MAP based.
Here's something that stumped me, the engine is not maintained at a vaccume (im assuming that's just how the ka24 is). When i pull the oil filler cap off it [language filter smackdown] out air which i would usually assume is blow-by. But the mean average of the movement of air actually produces a vacuum if i block the hole with my hand... Normally id just say the rings are shot but would it really draw more past the rings then gets blown past?
ill be having another look at it today anyway.
Good luck with your fuel pump issue!