Lets see if u all can help a confused "swede"

oookay here we go!!
I have problems to get the right CO-mixture, if i lean it rattles up to 2000RPM and then is the power coming, If I enrich the mixture it smokes really black (makes black spots on the ground) and takes about 2litres/10 kilometers, in both cases that little bastard is really tough to start up if the temperature is below 0 degrees Celsius/32 degrees farenheit

Things that I've been changed since i bought it is:
Complete mainfold with everything
Distributor Cap and Rotor for the ignition
Several sparkplugs
The OVP-relay
The fuel filtre

Can it be the Oxygen sensor that's messy? The engine reacts if i connect/disconnect it

P.S. I'll hope that you understand my bad english

__________________
Patrik Nilsson -83
230CE -88
230TE -87
http://www.hastonnet.se/putte/avatar-new.jpg

Or could it be the battery that doesn't deliver the correct power to crank it? The starter spins normal, but regret to start!

In short: I have two problems to solve, may you help me please

__________________
Patrik Nilsson -83
230CE -88
230TE -87
http://www.hastonnet.se/putte/avatar-new.jpg