Hi everyone...i have a partner 07 reg, with the 1.6hdi engine. Bought it with head gone. Had it skimmed and put back together no problem. So...all good, drove it around for a while..as im driving along at abt 70..it kind of 'coughed'..let out a cloud of dirty thick smoke..and since then, its awful to start...have to keep winding on starter until it fires. Runs rough, puffs out black smoke on idle. If i drive, it hesitates, then full power..but black smoke everywhere. Ok, so new fuel and oil filters, checked and cleaned egr valve, new MAF sensor, all injectors cracked off one at a time, and each one stalls engine. Any suggestions greatly appreciated. Was running lovely beforehand.