i am sure it is only the td5 in 9 0 and 110 that has an ecu, i kno wthis as a) i am keen not to drown it and b) i had a ecu re map done which i belive u cannot do on 300 tdi etc as it has no ecu?
300Tdi's with EGR valves have a small ECU under the seat to control the EGR only.. nothing to do with the actual running of the engine (i.e. still has a mechanical pump).
Apart from removing the EGR
... there's nothing else that can be done with the ECU. Any tweaks to the engine will be mechanical.
Late 300Tdi Auto's however, are ECU controlled. The ECU controls the fueling - the injector pump is very different to a standard mechanical one.
These engines can be 'chipped' as per Td5's... and they also respond quite well to it. All the chipping is doing is 'tweaking' the fuel map.
A geeky fact is that the ECU (and thus Auto) versions of the the 300Tdi are actually the most powerful version of the 300Tdi produced by the factory.
The full ECU controlled 300Tdi was never fitted to a Defender (though I would actually like to try it - if any one has got the bits lying around
) - unlike most people, I'm actually quite a fan of ECU's :roll: .
Ian