Engine managment light?????

Hi guys wondering if anyone has a clue what is going on with my Engine management light being on?
I live and work in Nigeria so as you can imagine getting anything serviced out here can be a bit of a drama.
My Discovery is a V8 and has done about 17000km mainly in town driving. The management light has now come on so i took it to the local Landrover dealer (Not very good i should add) who put it on the diagnostic machine and came up with the following faults.

Evaporative control system fault
Catalyst damaging misfire cyl 4
" " " cyl 8
" " " cyl 5
Mixture adaption factor for bank 1
Emission relevant misfire cyl 5
" " " Multiple cyl's

All very worrying as you can imagine.
They seen to manage to clear the problem when it leaves the garage, but the problem is back within a matter of hours.

Is it possible my vehicle is fitted with a catalytic converter and this is what is causing the problem as here in Nigeria there is no such thing as unleaded petrol.
If so is this causing engine damage?

All help greatly appreciated.


Steve

Going by your fault codes, I'd say fit new HT leads, its saying you have a missfire and leads are normally the culprit.

I wouldn't think your vehicle won't have a cat if its built for the country you live in, the fault code is the same for all markets, i.e if you have a missfire it'll say "cat damaging missfire" whether you have a cat or not.