156 JTD Black smoke and other issues
I have recently bought a 156 JTD 16v 53 plate. when we test drove it it ran really well and we spent a good while going over it for issues. Unfortunately it was about a week and a half before we actually bought it and it seems to have developed a load of problems in the meantime! It is pouring with black smoke, particularly when revved but also when sitting at about 60/70 in 6th gear. The temp gauge never gets above 45, could this be the cause of the smoke? I have read somewhere about the temp sensor possibly being the cause but doesn't seem to be mentioned much.
Also the gearbox that was fine when we drove it, is now also having problems. You have to lift the gear shift restrictor to get it into 5th or 6th. Oh and the aircon has stopped blowing cold too!
I have gone back to the guy we bought it off to ask if anything had happened/been done to it in between but not had a response yet. It definitely wasn't smoking at all before and the gears were fine.
Any advice would be much appreciated.