Thanks frosticles,
I dont know if this is the case,I believe the EGR valve (Exhaust Gas Recirculating valve) might be a mechanical devise that assists, or not,with the combustion process on some engines, someone asked me a question regarding this and as I hadnt come accross it, wasnt sure how it works or where it was fitted.
Of course you may be right and it is only fitted to later more sophisticated engines, Ime sure someone will let me know...
ps I like your landy looks good esp the colour, do you have any more pics
cheers