Sunray-I40 Posted March 12, 2018 Share Posted March 12, 2018 I have a 1995 300 TDI defender 110. Up to a few months ago I was getting 30 MPG ‘daily driving’. Sadly, the vehicle failed the MOT on emissions grounds. To cure the emissions problem I had to replace the turbo ( a vain had seized), recondition fuel injectors (they were 20-25% out), and recondition the fuel pump. At the same time I also had the engine carbon cleaned. After all this work, the increase in power was phenomenal and the emissions were virtually zero but this came at a cost — I now get 25 MPG daily driving (and I consciously keep my foot off the accelerator pedal!). I would like to get back to the 30 MPG I had (even if it means sacrificing some power). All advice welcome as I know naff all about fuel systems. Quote Link to comment Share on other sites More sharing options...
dailysleaze Posted March 12, 2018 Share Posted March 12, 2018 Check there isn't a leak somewhere, typically around the fuel injector unions. I dropped 3 mpg due to a single union slightly leaking on the back of the injection pump. The oil filter having diesel dripping from it is a tell-tale sign. I also lost 3mpg once for leaving my fuel cap at the petrol station... Quote Link to comment Share on other sites More sharing options...
cackshifter Posted March 14, 2018 Share Posted March 14, 2018 Check the spill rail pipes arent leaking too. You could always reduce the fuelling a little, eg rotate the diaphragm to reduce the depression rubbed on the fuel pin. Quote Link to comment Share on other sites More sharing options...
monkie Posted March 14, 2018 Share Posted March 14, 2018 Do you know if when the turbo was exchanged the waste gate actuator was adjusted to give the correct boost pressure? Quote Link to comment Share on other sites More sharing options...
Sunray-I40 Posted March 15, 2018 Author Share Posted March 15, 2018 On 3/14/2018 at 7:05 AM, monkie said: Do you know if when the turbo was exchanged the waste gate actuator was adjusted to give the correct boost pressure? i don't but i'll ask the guy that did the work, thanks for this Quote Link to comment Share on other sites More sharing options...
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