MPG down.

[Food Chauffeur]

Hi, i've got a 1.9TDI Sport, and i think one of the heater plugs
has packed in. It starts ok,except a little puff of smoke when cold,and
a strong smell of diesel, however, over the last 4weeks the MPG has dropped from around an average 52-57,to 45-48. Could it be related? The car's done 110k.
Thanks.

[towcestervag]

check the plastic pre heater tee piece on top of the fuel filter as these can crack

[djb1]

Hi, i've got a 1.9TDI Sport, and i think one of the heater plugs
has packed in. It starts ok,except a little puff of smoke when cold,and
a strong smell of diesel, however, over the last 4weeks the MPG has dropped from around an average 52-57,to 45-48. Could it be related? The car's done 110k.
Thanks.

when heater plugs fail the yellow heater plug symbol flashes for a while after start.

It has been cold, that alone could account for the fall in MPG