Ive just bought an Escort 1.8 Diesel van,it seems to smoke alot!Ive given it a service and its helped but it it does smoke abit still! It takes a while to start as aswell as the heater plugs are in need of a change, ut would this cause it to smoke when running?

When i say "it smokes" its not plumes but just like its runnin rich and its smells of fuel not oil!

Help much appreciated!