Peugeot 205 1.4 Carburettor Specifications

[Aysedasi]

OK, I'm out of my depth here, but my son needs some help.

He has an old (G prefix - 89/90) 205 1.4 which won't run. My Mitsubishi Mastertech (other) son reckons its a carburation problem but says that he doesn't know if it's actually the carburettor that's at fault, or the mechanism (my term!) leading to the carburettor. He says he ought to be able to sort it out, but needs to see the detailed technical specs for the carburation system. I've scoured the internet for them but can't find anything remotely detailed enough. When I suggested he look in my son's Haynes manual, he just looked at me with an expression of pity.........

Anyone got any ideas?