I know, it is kind of a disliked standard mantra, sorry!
Get the codes read with VIDA... 
If you had the engine light lit, there should be an error code stored, at least for that. You can check the fuel with VIDA as well.
It doesn't make sense, if you can't see something obvious, to guess along.
VIDA is "free of charge", and if you only buy a dice (or a substitute) you are around 100.- GBP. Here on this forum are some users, that sell these, eg. Cheshired5. Take a look into the "Sales" section of the V70 (
click here)