poor diesel economy

[ben rawlings]

Hi all

Non maestro or montego related question -

Our rover 25 TD is being very poor regard fuel economy consistancy.
One minute it will do 500 to a full tank and the next, you'l just about get 300.

I think the water temperature sender is nackered btw (dunno whether this is relivant on this engine)

Its a later type L series (54 plate) just to be clear

thanks in advance - advice appreciated

Ben

[guussi]

Yo got a leak....check all hoses?:confused:

mine used to get loose with the jubilee clip adjacent to fuel tank
check for any diesel spray around the engine...tighten bolts etc

:banghead:dunno

[E_T_V]

Injector leak off pipes are a common failure. The guages aren't the most accurate things in the world so check the actual mpg noting the number of litres it takes to fill it up each time.

[guussi]

fuel economy generally is as constant variable like the weather...
as it depends on:

air temp
Wind resistance
rain
tyre pressures
engine cleaness
air filter / last service
oil quality / last service
diesel quality
driver's irratic agressive style......:mad:

but in your case it has to be a leak from somewhere?!!:confused:

[emanresu]

if the temp sender is out or the thermostat is dodgy, then the engine will overfuel as it'll be sending incorrect signals to the ECU.