Any advice greatfully received. I had my 110 td5 upgraded by JE Engineering and it worked OK for a couple of months before going wrong at 4000 miles. Symptoms are hesitation, black smoke, loss of power etc. The new intercooler is not split and neither are the turbo hoses. According to JE Engineering, this all pointed to a faulty air flow meter which I renewed. this was OK for about 300 miles and then same again. So I put the old air flow meter back and this was OK for about 300 miles. I also tried the one from my wifes disco and that was OK for a while also. So nothing wrong with any of the air flow meters. Errr..... don't know what to look at next. Yeovil landrover wouldn't touch the car under warranty because it has been modified and just returned it on a trailer. JE Engineering just sold me the new air flow meter and then ran out of ideas.